Class: GeographicItem
- Inherits:
-
ApplicationRecord
- Object
- ActiveRecord::Base
- ApplicationRecord
- GeographicItem
- Includes:
- Housekeeping::Timestamps, Housekeeping::Users, Shared::HasPapertrail, Shared::IsData, Shared::SharedAcrossProjects
- Defined in:
- app/models/geographic_item.rb
Overview
A GeographicItem is one and only one of [point, line_string, polygon, multi_point, multi_line_string, multi_polygon, geometry_collection] which describes a position, path, or area on the globe, generally associated with a geographic_area (through a geographic_area_geographic_item entry), and sometimes only with a georeference.
Key methods in this giant library
‘#geo_object` - return a RGEO object representation
Direct Known Subclasses
GeometryCollection, LineString, MultiLineString, MultiPoint, MultiPolygon, Point, Polygon
Defined Under Namespace
Classes: GeometryCollection, LineString, MultiLineString, MultiPoint, MultiPolygon, Point, Polygon
Constant Summary collapse
- DATA_TYPES =
[ :point, :line_string, :polygon, :multi_point, :multi_line_string, :multi_polygon, :geometry_collection ].freeze
- GEOMETRY_SQL =
Arel::Nodes::Case.new(arel_table[:type]) .when('GeographicItem::MultiPolygon').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:multi_polygon].as('geometry')])) .when('GeographicItem::Point').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:point].as('geometry')])) .when('GeographicItem::LineString').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:line_string].as('geometry')])) .when('GeographicItem::Polygon').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:polygon].as('geometry')])) .when('GeographicItem::MultiLineString').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:multi_line_string].as('geometry')])) .when('GeographicItem::MultiPoint').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:multi_point].as('geometry')])) .when('GeographicItem::GeometryCollection').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:geometry_collection].as('geometry')])) .freeze
- GEOGRAPHY_SQL =
"CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN multi_polygon WHEN 'GeographicItem::Point' THEN point WHEN 'GeographicItem::LineString' THEN line_string WHEN 'GeographicItem::Polygon' THEN polygon WHEN 'GeographicItem::MultiLineString' THEN multi_line_string WHEN 'GeographicItem::MultiPoint' THEN multi_point WHEN 'GeographicItem::GeometryCollection' THEN geometry_collection END".freeze
- ANTI_MERIDIAN =
ANTI_MERIDIAN = ‘0X0102000020E61000000200000000000000008066400000000000405640000000000080664000000000004056C0’
'LINESTRING (180 89.0, 180 -89)'.freeze
Instance Attribute Summary collapse
-
#cached_total_area ⇒ Numeric
If polygon-based the value of the enclosed area in square meters.
-
#geometry ⇒ Hash?
An internal variable for use in super calls, holds a Hash in GeoJSON format (temporarily).
- #line_string ⇒ RGeo::Geographic::ProjectedLineStringImpl
- #multi_line_string ⇒ RGeo::Geographic::ProjectedMultiLineStringImpl
- #multi_point ⇒ RGeo::Geographic::ProjectedMultiPointImpl
-
#multi_polygon ⇒ RGeo::Geographic::ProjectedMultiPolygonImpl
CCW orientation is applied.
-
#no_cached ⇒ Boolean
When true cached values are not built.
- #point ⇒ RGeo::Geographic::ProjectedPointImpl
-
#polygon ⇒ RGeo::Geographic::ProjectedPolygonImpl
CCW orientation is applied.
-
#shape ⇒ Boolean, RGeo object
TODO: WHY! boolean not nil, or object Used to build geographic items from a shape [ of what class ] !?.
-
#type ⇒ String
Rails STI, determines the geography column as well.
Attributes included from Housekeeping::Users
Class Method Summary collapse
- .aliased_geographic_sql(name = 'a') ⇒ Object
-
.are_contained_in_item(column_name, *geographic_items) ⇒ Scope
See are_contained_in_item_by_id.
-
.are_contained_in_item_by_id(column_name, *geographic_item_ids) ⇒ Scope
rubocop:disable Metrics/MethodLength If this scope is given an Array of GeographicItems as a second parameter, it will return the ‘OR’ of each of the objects against the table.
-
.are_contained_in_wkt(column_name, geometry) ⇒ Scope
a single WKT geometry is compared against column or columns (except geometry_collection) to find geographic_items which are contained in the WKT.
-
.contained_by(*geographic_item_ids) ⇒ Scope
(works via ST_ContainsProperly).
-
.contained_by_where_sql(*geographic_item_ids) ⇒ String
Note: Can not use GEOMETRY_SQL because geometry_collection is not supported in ST_ContainsProperly Note: !! If the target GeographicItem#id crosses the anti-meridian then you may/will get unexpected results.
-
.contained_by_with_antimeridian_check(*ids) ⇒ Array
TODO: test this.
-
.contained_by_wkt_shifted_sql(wkt) ⇒ String
Note: this routine is called when it is already known that the A argument crosses anti-meridian.
-
.contained_by_wkt_sql(wkt) ⇒ String
TODO: Remove the hard coded 4326 reference.
-
.containing(*geographic_item_ids) ⇒ Scope
The geographic items containing these collective geographic_item ids, not including self.
-
.containing_point(rgeo_point) ⇒ Scope
TODO: should be containing_wkt ?.
-
.containing_sql(target_column_name = nil, geographic_item_id = nil, source_column_name = nil) ⇒ String
A SQL fragment for ST_Contains() function, returns all geographic items which are contained in the item supplied.
-
.containing_where_for_point_sql(rgeo_point) ⇒ String
TODO: Remove the hard coded 4326 reference TODO: should this be wkt_point instead of rgeo_point?.
- .containing_where_sql(*geographic_item_ids) ⇒ String
- .containing_where_sql_geog(*geographic_item_ids) ⇒ String
-
.crosses_anti_meridian?(wkt) ⇒ Boolean
Whether or not the wtk intersects with the anti-meridian !! StrongParams security considerations.
-
.crosses_anti_meridian_by_id?(*ids) ⇒ Boolean
Whether or not any GeographicItem passed intersects the anti-meridian !! StrongParams security considerations This is our first line of defense against queries that define multiple shapes, one or more of which crosses the anti-meridian.
-
.debug_draw(geographic_item_ids = []) ⇒ Object
private
Crude debuging helper, write the shapes to a png.
- .default_by_geographic_area_ids(geographic_area_ids = []) ⇒ GeographicItem::ActiveRecord_Relation
-
.disjoint_from(column_name, *geographic_items) ⇒ Scope
A SQL fragment for ST_DISJOINT, specifies all geographic_items that have data in column_name that are disjoint from the passed geographic_items.
- .distance_between(geographic_item_id1, geographic_item_id2) ⇒ Float
-
.eval_for_type(type_name) ⇒ String
If type.
-
.geometry_for(geographic_item_id) ⇒ RGeo::Geographic object
example, not used.
-
.geometry_for_collection_sql(*geographic_item_ids) ⇒ String
example, not used.
-
.geometry_for_sql(geographic_item_id) ⇒ String
example, not used.
-
.geometry_sql(geographic_item_id = nil, source_column_name = nil) ⇒ String
source_column_name, i.e.
-
.geometry_sql2(*geographic_item_ids) ⇒ String
geometry as ‘geometry’ for a single id.
- .intersecting(column_name, *geographic_items) ⇒ Scope
-
.intersecting_radius_of_wkt_sql(wkt, distance) ⇒ String
TODO: 3D is overkill here !! This is intersecting.
-
.is_contained_by(column_name, *geographic_items) ⇒ Scope
rubocop:disable Metrics/MethodLength containing the items the shape of which is contained in the geographic_item supplied.
-
.is_contained_by_sql(column_name, geographic_item) ⇒ String
rubocop:disable Metrics/MethodLength.
-
.lat_long_sql(choice) ⇒ String
A fragment returning either latitude or longitude columns.
- .not_including(geographic_items) ⇒ Scope
- .ordered_by_longest_distance_from(column_name, geographic_item) ⇒ Scope
- .ordered_by_shortest_distance_from(column_name, geographic_item) ⇒ Scope
-
.point_inferred_geographic_name_hierarchy(point) ⇒ Hash
As per #inferred_geographic_name_hierarchy but for Rgeo point.
-
.reverse_containing_sql(target_column_name = nil, geographic_item_id = nil, source_column_name = nil) ⇒ String
A SQL fragment for ST_Contains(), returns all geographic_items which contain the supplied geographic_item.
- .select_distance_with_geo_object(column_name, geographic_item) ⇒ String
-
.select_geography_sql(geographic_item_id) ⇒ String
A SQL select statement that returns the geography for the geographic_item with the specified id.
-
.select_geometry_sql(geographic_item_id) ⇒ String
A SQL select statement that returns the geometry for the geographic_item with the specified id.
-
.single_geometry_sql(*geographic_item_ids) ⇒ String
Returns one or more geographic items combined as a single geometry in column ‘single’.
- .st_buffer_st_within(geographic_item_id, distance, buffer = 0) ⇒ String
- .st_collect(geographic_item_scope) ⇒ Object
-
.st_collect_sql(*geographic_item_ids) ⇒ String
provided via ST_Collect).
-
.st_multi(*geographic_item_ids) ⇒ Scope
example, not used.
- .st_union(geographic_item_scope) ⇒ Object
- .where_distance_greater_than_zero(column_name, geographic_item) ⇒ Scope
-
.with_area ⇒ Scope
Adds an area_in_meters field, with meters.
-
.with_collecting_event_through_georeferences ⇒ Scope
This uses an Arel table approach, this is ultimately more decomposable if we need.
-
.with_is_valid_geometry_column(geographic_item) ⇒ Scope
Includes an ‘is_valid’ attribute (True/False) for the passed geographic_item.
-
.with_latitude ⇒ Scope
Include a ‘latitude’ column.
-
.with_longitude ⇒ Scope
Include a ‘longitude’ column.
-
.within_radius_of_item(geographic_item_id, distance) ⇒ ActiveRecord::Relation
!! should be distance, not radius?!.
- .within_radius_of_item_sql(geographic_item_id, distance) ⇒ String
-
.within_radius_of_wkt_sql(wkt, distance) ⇒ String
!! This is fully covering.
Instance Method Summary collapse
- #align_winding ⇒ Object private
-
#area ⇒ Float
TODO: share with world Geographic item 96862 (Cajamar in Brazil) is the only(?) record to fail using ‘false` (quicker) method of everything we tested.
-
#center_coords ⇒ Array
The lat, long, as STRINGs for the centroid of this geographic item Meh- this: postgis.net/docs/en/ST_MinimumBoundingRadius.html.
-
#centroid ⇒ RGeo::Geographic::ProjectedPointImpl
Representing the centroid of this geographic item.
-
#containing_geographic_areas ⇒ Scope
The Geographic Areas that contain (gis) this geographic item.
- #contains?(target_geo_object) ⇒ Boolean
- #far(target_geo_object, distance) ⇒ Boolean
-
#geo_object ⇒ RGeo instance?
The Rgeo shape (See rubydoc.info/github/dazuma/rgeo/RGeo/Feature).
-
#geo_object_type ⇒ Symbol
according to the list of DATA_TYPES, or nil.
-
#geo_type ⇒ Symbol
private
Returns the attribute (column name) containing data nearly all methods should use #geo_object_type, not geo_type.
- #geographic_name_hierarchy ⇒ Object
-
#has_polygons? ⇒ Boolean
!! Unused.
-
#inferred_geographic_name_hierarchy ⇒ Hash
finding the smallest area containing this GeographicItem, in the most accurate gazetteer and using it to return country/state/county.
-
#intersecting_area(geographic_item_id) ⇒ Float, false
The value in square meters of the interesecting area of this and another GeographicItem.
- #intersects?(target_geo_object) ⇒ Boolean
-
#is_basic_donut? ⇒ Boolean
!! Does not confirm that shapes are nested !!.
-
#line_string_to_a(line_string) ⇒ Array
private
Of points in the line.
-
#line_string_to_hash(line_string) ⇒ Hash
private
Of points in the line.
-
#multi_line_string_to_a(multi_line_string) ⇒ Array
private
Of line_strings as arrays of points.
-
#multi_line_string_to_hash(_multi_line_string) ⇒ Hash
private
Of line_strings as hashes of points.
-
#multi_point_to_a(multi_point) ⇒ Array
private
Of points.
-
#multi_point_to_hash(_multi_point) ⇒ Hash
private
Of points.
-
#multi_polygon_to_a(multi_polygon) ⇒ Array
private
Of arrays of points in the polygons (exterior_ring ONLY).
-
#multi_polygon_to_hash(_multi_polygon) ⇒ Hash
private
Of hashes of points in the polygons (exterior_ring ONLY).
- #near(target_geo_object, distance) ⇒ Boolean
-
#orientations ⇒ Object
Convention is to store in PostGIS in CCW.
-
#point_to_a(point) ⇒ Array
private
Of a point Longitude |, Latitude -.
-
#point_to_hash(point) ⇒ Hash
private
Of a point.
-
#polygon_to_a(polygon) ⇒ Array
private
Of points in the polygon (exterior_ring ONLY).
-
#polygon_to_hash(polygon) ⇒ Hash
private
Of points in the polygon (exterior_ring ONLY).
-
#quick_geographic_name_hierarchy ⇒ Hash
This is a quick approach that works only when the geographic_item is linked explicitly to a GeographicArea.
-
#radius ⇒ Object
TODO: This is bad, while internal use of ONE_WEST_MEAN is consistent it is in-accurate given the vast differences of radius vs.
-
#rgeo_to_geo_json ⇒ GeoJSON hash
Via Rgeo apparently necessary for GeometryCollection.
-
#set_cached ⇒ Object
private
else render json: false end end.
-
#set_type_if_geography_present ⇒ Boolean, String
private
False if already set, or type to which it was set.
-
#some_data_is_provided ⇒ Boolean
private
Iff there is one and only one shape column set.
-
#st_centroid ⇒ String
A WKT POINT representing the centroid of the geographic item.
-
#st_distance(geographic_item_id) ⇒ Double
(also: #distance_to)
Distance in meters (slower, more accurate).
-
#st_distance_spheroid(geographic_item_id) ⇒ Double
Distance in meters (faster, less accurate).
-
#st_distance_to_geographic_item(geographic_item) ⇒ Double
Like st_distance but works with changed and non persisted objects.
- #st_isvalid ⇒ Object
- #st_isvalidreason ⇒ Object
-
#st_npoints ⇒ Integer
The number of points in the geometry.
-
#start_point ⇒ Array of latitude, longitude
The lat, lon of the first point in the GeoItem, see subclass for #st_start_point.
-
#to_geo_json ⇒ Hash
In GeoJSON format Computed via “raw” PostGIS (much faster).
-
#to_geo_json_feature ⇒ Hash
The shape as a GeoJSON Feature with some item metadata.
-
#to_geo_json_string ⇒ Object
We don’t need to serialize to/from JSON.
- #to_wkt ⇒ String
-
#valid_geometry? ⇒ Boolean
Whether stored shape is ST_IsValid.
- #within?(target_geo_object) ⇒ Boolean
Methods included from Shared::IsData
#errors_excepting, #full_error_messages_excepting, #identical, #is_community?, #is_destroyable?, #is_editable?, #is_in_use?, #is_in_users_projects?, #metamorphosize, #similar
Methods included from Shared::HasPapertrail
#attribute_updated, #attribute_updater
Methods included from Housekeeping::Users
#set_created_by_id, #set_updated_by_id
Methods inherited from ApplicationRecord
Instance Attribute Details
#cached_total_area ⇒ Numeric
Returns if polygon-based the value of the enclosed area in square meters.
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# File 'app/models/geographic_item.rb', line 40 class GeographicItem < ApplicationRecord include Housekeeping::Users include Housekeeping::Timestamps include Shared::HasPapertrail include Shared::IsData include Shared::SharedAcrossProjects # @return [Hash, nil] # An internal variable for use in super calls, holds a Hash in GeoJSON format (temporarily) attr_accessor :geometry # @return [Boolean, RGeo object] # @params value [Hash in GeoJSON format] ?! # TODO: WHY! boolean not nil, or object # Used to build geographic items from a shape [ of what class ] !? attr_accessor :shape # @return [Boolean] # When true cached values are not built attr_accessor :no_cached DATA_TYPES = [ :point, :line_string, :polygon, :multi_point, :multi_line_string, :multi_polygon, :geometry_collection ].freeze GEOMETRY_SQL = Arel::Nodes::Case.new(arel_table[:type]) .when('GeographicItem::MultiPolygon').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:multi_polygon].as('geometry')])) .when('GeographicItem::Point').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:point].as('geometry')])) .when('GeographicItem::LineString').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:line_string].as('geometry')])) .when('GeographicItem::Polygon').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:polygon].as('geometry')])) .when('GeographicItem::MultiLineString').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:multi_line_string].as('geometry')])) .when('GeographicItem::MultiPoint').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:multi_point].as('geometry')])) .when('GeographicItem::GeometryCollection').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:geometry_collection].as('geometry')])) .freeze GEOGRAPHY_SQL = "CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN multi_polygon WHEN 'GeographicItem::Point' THEN point WHEN 'GeographicItem::LineString' THEN line_string WHEN 'GeographicItem::Polygon' THEN polygon WHEN 'GeographicItem::MultiLineString' THEN multi_line_string WHEN 'GeographicItem::MultiPoint' THEN multi_point WHEN 'GeographicItem::GeometryCollection' THEN geometry_collection END".freeze # ANTI_MERIDIAN = '0X0102000020E61000000200000000000000008066400000000000405640000000000080664000000000004056C0' ANTI_MERIDIAN = 'LINESTRING (180 89.0, 180 -89)'.freeze has_many :cached_map_items, inverse_of: :geographic_item has_many :geographic_areas_geographic_items, dependent: :destroy, inverse_of: :geographic_item has_many :geographic_areas, through: :geographic_areas_geographic_items has_many :asserted_distributions, through: :geographic_areas has_many :geographic_area_types, through: :geographic_areas has_many :parent_geographic_areas, through: :geographic_areas, source: :parent has_many :georeferences, inverse_of: :geographic_item has_many :georeferences_through_error_geographic_item, class_name: 'Georeference', foreign_key: :error_geographic_item_id, inverse_of: :error_geographic_item has_many :collecting_events_through_georeferences, through: :georeferences, source: :collecting_event has_many :collecting_events_through_georeference_error_geographic_item, through: :georeferences_through_error_geographic_item, source: :collecting_event # TODO: THIS IS NOT GOOD before_validation :set_type_if_geography_present validate :some_data_is_provided validates :type, presence: true # not needed scope :include_collecting_event, -> { includes(:collecting_events_through_georeferences) } scope :geo_with_collecting_event, -> { joins(:collecting_events_through_georeferences) } scope :err_with_collecting_event, -> { joins(:georeferences_through_error_geographic_item) } after_save :set_cached, unless: Proc.new {|n| n.no_cached || errors.any? } after_save :align_winding class << self def aliased_geographic_sql(name = 'a') "CASE #{name}.type \ WHEN 'GeographicItem::MultiPolygon' THEN #{name}.multi_polygon \ WHEN 'GeographicItem::Point' THEN #{name}.point \ WHEN 'GeographicItem::LineString' THEN #{name}.line_string \ WHEN 'GeographicItem::Polygon' THEN #{name}.polygon \ WHEN 'GeographicItem::MultiLineString' THEN #{name}.multi_line_string \ WHEN 'GeographicItem::MultiPoint' THEN #{name}.multi_point \ WHEN 'GeographicItem::GeometryCollection' THEN #{name}.geometry_collection \ END" end def st_union(geographic_item_scope) GeographicItem.select("ST_Union(#{GeographicItem::GEOMETRY_SQL.to_sql}) as collection") .where(id: geographic_item_scope.pluck(:id)) end def st_collect(geographic_item_scope) GeographicItem.select("ST_Collect(#{GeographicItem::GEOMETRY_SQL.to_sql}) as collection") .where(id: geographic_item_scope.pluck(:id)) end # @return [GeographicItem::ActiveRecord_Relation] # @params [Array] array of geographic area ids def default_by_geographic_area_ids(geographic_area_ids = []) GeographicItem. joins(:geographic_areas_geographic_items). merge(::GeographicAreasGeographicItem.default_geographic_item_data). where(geographic_areas_geographic_items: {geographic_area_id: geographic_area_ids}) end # @param [String] wkt # @return [Boolean] # whether or not the wtk intersects with the anti-meridian # !! StrongParams security considerations def crosses_anti_meridian?(wkt) GeographicItem.find_by_sql( ['SELECT ST_Intersects(ST_GeogFromText(?), ST_GeogFromText(?)) as r;', wkt, ANTI_MERIDIAN] ).first.r end # @param [Integer] ids # @return [Boolean] # whether or not any GeographicItem passed intersects the anti-meridian # !! StrongParams security considerations # This is our first line of defense against queries that define multiple shapes, one or # more of which crosses the anti-meridian. In this case the current TW strategy within the # UI is to abandon the search, and prompt the user to refactor the query. def crosses_anti_meridian_by_id?(*ids) q1 = ["SELECT ST_Intersects((SELECT single_geometry FROM (#{GeographicItem.single_geometry_sql(*ids)}) as " \ 'left_intersect), ST_GeogFromText(?)) as r;', ANTI_MERIDIAN] _q2 = ActiveRecord::Base.send(:sanitize_sql_array, ['SELECT ST_Intersects((SELECT single_geometry FROM (?) as ' \ 'left_intersect), ST_GeogFromText(?)) as r;', GeographicItem.single_geometry_sql(*ids), ANTI_MERIDIAN]) GeographicItem.find_by_sql(q1).first.r end # # SQL fragments # # @param [Integer, String] # @return [String] # a SQL select statement that returns the *geometry* for the geographic_item with the specified id def select_geometry_sql(geographic_item_id) "SELECT #{GeographicItem::GEOMETRY_SQL.to_sql} from geographic_items where geographic_items.id = #{geographic_item_id}" end # @param [Integer, String] # @return [String] # a SQL select statement that returns the geography for the geographic_item with the specified id def select_geography_sql(geographic_item_id) ActiveRecord::Base.send(:sanitize_sql_for_conditions, [ "SELECT #{GeographicItem::GEOMETRY_SQL.to_sql} from geographic_items where geographic_items.id = ?", geographic_item_id]) end # @param [Symbol] choice # @return [String] # a fragment returning either latitude or longitude columns def lat_long_sql(choice) return nil unless [:latitude, :longitude].include?(choice) f = "'D.DDDDDD'" # TODO: probably a constant somewhere v = (choice == :latitude ? 1 : 2) "CASE geographic_items.type WHEN 'GeographicItem::GeometryCollection' THEN split_part(ST_AsLatLonText(ST_Centroid" \ "(geometry_collection::geometry), #{f}), ' ', #{v}) WHEN 'GeographicItem::LineString' THEN split_part(ST_AsLatLonText(ST_Centroid(line_string::geometry), " \ "#{f}), ' ', #{v}) WHEN 'GeographicItem::MultiPolygon' THEN split_part(ST_AsLatLonText(" \ "ST_Centroid(multi_polygon::geometry), #{f}), ' ', #{v}) WHEN 'GeographicItem::Point' THEN split_part(ST_AsLatLonText(" \ "ST_Centroid(point::geometry), #{f}), ' ', #{v}) WHEN 'GeographicItem::Polygon' THEN split_part(ST_AsLatLonText(" \ "ST_Centroid(polygon::geometry), #{f}), ' ', #{v}) WHEN 'GeographicItem::MultiLineString' THEN split_part(ST_AsLatLonText(" \ "ST_Centroid(multi_line_string::geometry), #{f} ), ' ', #{v}) WHEN 'GeographicItem::MultiPoint' THEN split_part(ST_AsLatLonText(" \ "ST_Centroid(multi_point::geometry), #{f}), ' ', #{v}) END as #{choice}" end # @param [Integer] geographic_item_id # @param [Integer] distance # @return [String] def within_radius_of_item_sql(geographic_item_id, distance) "ST_DWithin((#{GeographicItem::GEOGRAPHY_SQL}), (#{select_geography_sql(geographic_item_id)}), #{distance})" end # @param [Integer] geographic_item_id # @param [Number] distance in meters to grow/shrink the shape (negative allowed) # @param [Number] distance (in meters) (positive only?!) # @return [String] def st_buffer_st_within(geographic_item_id, distance, buffer = 0) "ST_DWithin( ST_Buffer(#{GeographicItem::GEOGRAPHY_SQL}, #{buffer}), (#{select_geography_sql(geographic_item_id)}), #{distance} )" end # TODO: 3D is overkill here # @param [String] wkt # @param [Integer] distance (meters) # @return [String] # !! This is intersecting def intersecting_radius_of_wkt_sql(wkt, distance) "ST_DWithin((#{GeographicItem::GEOGRAPHY_SQL}), ST_Transform( ST_GeomFromText('#{wkt}', " \ "4326), 4326), #{distance})" end # @param [String] wkt # @param [Integer] distance (meters) # @return [String] # !! This is fully covering def within_radius_of_wkt_sql(wkt, distance) "ST_Covers( ST_Buffer(ST_SetSRID( ST_GeomFromText('#{wkt}'), 4326)::geography, #{distance}), (#{GeographicItem::GEOGRAPHY_SQL}))" end # @param [String, Integer, String] # @return [String] # a SQL fragment for ST_Contains() function, returns # all geographic items which are contained in the item supplied def containing_sql(target_column_name = nil, geographic_item_id = nil, source_column_name = nil) return 'false' if geographic_item_id.nil? || source_column_name.nil? || target_column_name.nil? "ST_Contains(#{target_column_name}::geometry, (#{geometry_sql(geographic_item_id, source_column_name)}))" end # @param [String, Integer, String] # @return [String] # a SQL fragment for ST_Contains(), returns # all geographic_items which contain the supplied geographic_item def reverse_containing_sql(target_column_name = nil, geographic_item_id = nil, source_column_name = nil) return 'false' if geographic_item_id.nil? || source_column_name.nil? || target_column_name.nil? "ST_Contains((#{geometry_sql(geographic_item_id, source_column_name)}), #{target_column_name}::geometry)" end # @param [Integer, String] # @return [String] # a SQL fragment that represents the geometry of the geographic item specified (which has data in the # source_column_name, i.e. geo_object_type) def geometry_sql(geographic_item_id = nil, source_column_name = nil) return 'false' if geographic_item_id.nil? || source_column_name.nil? "select geom_alias_tbl.#{source_column_name}::geometry from geographic_items geom_alias_tbl " \ "where geom_alias_tbl.id = #{geographic_item_id}" end # rubocop:disable Metrics/MethodLength # @param [String] column_name # @param [GeographicItem] geographic_item # @return [String] of SQL def is_contained_by_sql(column_name, geographic_item) geo_id = geographic_item.id geo_type = geographic_item.geo_object_type template = '(ST_Contains((select geographic_items.%s::geometry from geographic_items where ' \ 'geographic_items.id = %d), %s::geometry))' retval = [] column_name.downcase! case column_name when 'any' DATA_TYPES.each { |column| unless column == :geometry_collection retval.push(template % [geo_type, geo_id, column]) end } when 'any_poly', 'any_line' DATA_TYPES.each { |column| unless column == :geometry_collection if column.to_s.index(column_name.gsub('any_', '')) retval.push(template % [geo_type, geo_id, column]) end end } else retval = template % [geo_type, geo_id, column_name] end retval = retval.join(' OR ') if retval.instance_of?(Array) retval end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] # a select query that returns a single geometry (column name 'single_geometry' for the collection of ids # provided via ST_Collect) def st_collect_sql(*geographic_item_ids) geographic_item_ids.flatten! ActiveRecord::Base.send(:sanitize_sql_for_conditions, [ "SELECT ST_Collect(f.the_geom) AS single_geometry FROM ( SELECT (ST_DUMP(#{GeographicItem::GEOMETRY_SQL.to_sql})).geom as the_geom FROM geographic_items WHERE id in (?)) AS f", geographic_item_ids]) end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] # returns one or more geographic items combined as a single geometry in column 'single' def single_geometry_sql(*geographic_item_ids) a = GeographicItem.st_collect_sql(geographic_item_ids) '(SELECT single.single_geometry FROM (' + a + ' ) AS single)' end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] # returns a single geometry "column" (paren wrapped) as "single" for multiple geographic item ids, or the # geometry as 'geometry' for a single id def geometry_sql2(*geographic_item_ids) geographic_item_ids.flatten! # *ALWAYS* reduce the pile to a single level of ids if geographic_item_ids.count == 1 "(#{GeographicItem.geometry_for_sql(geographic_item_ids.first)})" else GeographicItem.single_geometry_sql(geographic_item_ids) end end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] def containing_where_sql(*geographic_item_ids) "ST_CoveredBy( #{GeographicItem.geometry_sql2(*geographic_item_ids)}, CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN multi_polygon::geometry WHEN 'GeographicItem::Point' THEN point::geometry WHEN 'GeographicItem::LineString' THEN line_string::geometry WHEN 'GeographicItem::Polygon' THEN polygon::geometry WHEN 'GeographicItem::MultiLineString' THEN multi_line_string::geometry WHEN 'GeographicItem::MultiPoint' THEN multi_point::geometry END)" end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] def containing_where_sql_geog(*geographic_item_ids) "ST_CoveredBy( #{GeographicItem.geometry_sql2(*geographic_item_ids)}, CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN multi_polygon::geography WHEN 'GeographicItem::Point' THEN point::geography WHEN 'GeographicItem::LineString' THEN line_string::geography WHEN 'GeographicItem::Polygon' THEN polygon::geography WHEN 'GeographicItem::MultiLineString' THEN multi_line_string::geography WHEN 'GeographicItem::MultiPoint' THEN multi_point::geography END)" end # @param [Interger, Array of Integer] ids # @return [Array] # If we detect that some query id has crossed the meridian, then loop through # and "manually" build up a list of results. # Should only be used if GeographicItem.crosses_anti_meridian_by_id? is true. # Note that this does not return a Scope, so you can't chain it like contained_by? # TODO: test this def contained_by_with_antimeridian_check(*ids) ids.flatten! # make sure there is only one level of splat (*) results = [] crossing_ids = [] ids.each do |id| # push each which crosses crossing_ids.push(id) if GeographicItem.crosses_anti_meridian_by_id?(id) end non_crossing_ids = ids - crossing_ids results.push GeographicItem.contained_by(non_crossing_ids).to_a if non_crossing_ids.any? crossing_ids.each do |id| # [61666, 61661, 61659, 61654, 61639] q1 = ActiveRecord::Base.send(:sanitize_sql_array, ['SELECT ST_AsText((SELECT polygon FROM geographic_items ' \ 'WHERE id = ?))', id]) r = GeographicItem.where( # GeographicItem.contained_by_wkt_shifted_sql(GeographicItem.find(id).geo_object.to_s) GeographicItem.contained_by_wkt_shifted_sql( ApplicationRecord.connection.execute(q1).first['st_astext']) ).to_a results.push(r) end results.flatten.uniq end # @params [String] well known text # @return [String] the SQL fragment for the specific geometry type, shifted by longitude # Note: this routine is called when it is already known that the A argument crosses anti-meridian def contained_by_wkt_shifted_sql(wkt) "ST_Contains(ST_ShiftLongitude(ST_GeomFromText('#{wkt}', 4326)), ( CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN ST_ShiftLongitude(multi_polygon::geometry) WHEN 'GeographicItem::Point' THEN ST_ShiftLongitude(point::geometry) WHEN 'GeographicItem::LineString' THEN ST_ShiftLongitude(line_string::geometry) WHEN 'GeographicItem::Polygon' THEN ST_ShiftLongitude(polygon::geometry) WHEN 'GeographicItem::MultiLineString' THEN ST_ShiftLongitude(multi_line_string::geometry) WHEN 'GeographicItem::MultiPoint' THEN ST_ShiftLongitude(multi_point::geometry) END ) )" end # TODO: Remove the hard coded 4326 reference # @params [String] wkt # @return [String] SQL fragment limiting geographics items to those in this WKT def contained_by_wkt_sql(wkt) if crosses_anti_meridian?(wkt) retval = contained_by_wkt_shifted_sql(wkt) else retval = "ST_Contains(ST_GeomFromText('#{wkt}', 4326), ( CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN multi_polygon::geometry WHEN 'GeographicItem::Point' THEN point::geometry WHEN 'GeographicItem::LineString' THEN line_string::geometry WHEN 'GeographicItem::Polygon' THEN polygon::geometry WHEN 'GeographicItem::MultiLineString' THEN multi_line_string::geometry WHEN 'GeographicItem::MultiPoint' THEN multi_point::geometry END ) )" end retval end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] sql for contained_by via ST_ContainsProperly # Note: Can not use GEOMETRY_SQL because geometry_collection is not supported in ST_ContainsProperly # Note: !! If the target GeographicItem#id crosses the anti-meridian then you may/will get unexpected results. def contained_by_where_sql(*geographic_item_ids) "ST_Contains( #{GeographicItem.geometry_sql2(*geographic_item_ids)}, CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN multi_polygon::geometry WHEN 'GeographicItem::Point' THEN point::geometry WHEN 'GeographicItem::LineString' THEN line_string::geometry WHEN 'GeographicItem::Polygon' THEN polygon::geometry WHEN 'GeographicItem::MultiLineString' THEN multi_line_string::geometry WHEN 'GeographicItem::MultiPoint' THEN multi_point::geometry END)" end # @param [RGeo:Point] rgeo_point # @return [String] sql for containing via ST_CoveredBy # TODO: Remove the hard coded 4326 reference # TODO: should this be wkt_point instead of rgeo_point? def containing_where_for_point_sql(rgeo_point) "ST_CoveredBy( ST_GeomFromText('#{rgeo_point}', 4326), #{GeographicItem::GEOMETRY_SQL.to_sql} )" end # @param [Interger] geographic_item_id # @return [String] SQL for geometries # example, not used def geometry_for_sql(geographic_item_id) 'SELECT ' + GeographicItem::GEOMETRY_SQL.to_sql + ' AS geometry FROM geographic_items WHERE id = ' \ "#{geographic_item_id} LIMIT 1" end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] SQL for geometries # example, not used def geometry_for_collection_sql(*geographic_item_ids) 'SELECT ' + GeographicItem::GEOMETRY_SQL.to_sql + ' AS geometry FROM geographic_items WHERE id IN ' \ "( #{geographic_item_ids.join(',')} )" end # # Scopes # # @param [Interger, Array of Integer] geographic_item_ids # @return [Scope] # the geographic items containing these collective geographic_item ids, not including self def containing(*geographic_item_ids) where(GeographicItem.containing_where_sql(geographic_item_ids)).not_ids(*geographic_item_ids) end # @param [Interger, Array of Integer] geographic_item_ids # @return [Scope] # the geographic items contained by any of these geographic_item ids, not including self # (works via ST_ContainsProperly) def contained_by(*geographic_item_ids) where(GeographicItem.contained_by_where_sql(geographic_item_ids)) end # @param [RGeo::Point] rgeo_point # @return [Scope] # the geographic items containing this point # TODO: should be containing_wkt ? def containing_point(rgeo_point) where(GeographicItem.containing_where_for_point_sql(rgeo_point)) end # @return [Scope] # adds an area_in_meters field, with meters def with_area select("ST_Area(#{GeographicItem::GEOGRAPHY_SQL}, false) as area_in_meters") end # return [Scope] # A scope that limits the result to those GeographicItems that have a collecting event # through either the geographic_item or the error_geographic_item # # A raw SQL join approach for comparison # # GeographicItem.joins('LEFT JOIN georeferences g1 ON geographic_items.id = g1.geographic_item_id'). # joins('LEFT JOIN georeferences g2 ON geographic_items.id = g2.error_geographic_item_id'). # where("(g1.geographic_item_id IS NOT NULL OR g2.error_geographic_item_id IS NOT NULL)").uniq # @return [Scope] GeographicItem # This uses an Arel table approach, this is ultimately more decomposable if we need. Of use: # http://danshultz.github.io/talks/mastering_activerecord_arel <- best # https://github.com/rails/arel # http://stackoverflow.com/questions/4500629/use-arel-for-a-nested-set-join-query-and-convert-to-activerecordrelation # http://rdoc.info/github/rails/arel/Arel/SelectManager # http://stackoverflow.com/questions/7976358/activerecord-arel-or-condition # def with_collecting_event_through_georeferences geographic_items = GeographicItem.arel_table georeferences = Georeference.arel_table g1 = georeferences.alias('a') g2 = georeferences.alias('b') c = geographic_items.join(g1, Arel::Nodes::OuterJoin).on(geographic_items[:id].eq(g1[:geographic_item_id])) .join(g2, Arel::Nodes::OuterJoin).on(geographic_items[:id].eq(g2[:error_geographic_item_id])) GeographicItem.joins(# turn the Arel back into scope c.join_sources # translate the Arel join to a join hash(?) ).where( g1[:id].not_eq(nil).or(g2[:id].not_eq(nil)) # returns a Arel::Nodes::Grouping ).distinct end # @return [Scope] include a 'latitude' column def with_latitude select(lat_long_sql(:latitude)) end # @return [Scope] include a 'longitude' column def with_longitude select(lat_long_sql(:longitude)) end # @param [String, GeographicItems] # @return [Scope] def intersecting(column_name, *geographic_items) if column_name.downcase == 'any' pieces = [] DATA_TYPES.each { |column| pieces.push(GeographicItem.intersecting(column.to_s, geographic_items).to_a) } # @TODO change 'id in (?)' to some other sql construct GeographicItem.where(id: pieces.flatten.map(&:id)) else q = geographic_items.flatten.collect { |geographic_item| "ST_Intersects(#{column_name}, '#{geographic_item.geo_object}' )" # seems like we want this: http://danshultz.github.io/talks/mastering_activerecord_arel/#/15/2 }.join(' or ') where(q) end end # @param [GeographicItem#id] geographic_item_id # @param [Float] distance in meters ?!?! # @return [ActiveRecord::Relation] # !! should be distance, not radius?! def within_radius_of_item(geographic_item_id, distance) where(within_radius_of_item_sql(geographic_item_id, distance)) end # @param [String, GeographicItem] # @return [Scope] # a SQL fragment for ST_DISJOINT, specifies all geographic_items that have data in column_name # that are disjoint from the passed geographic_items def disjoint_from(column_name, *geographic_items) q = geographic_items.flatten.collect { |geographic_item| "ST_DISJOINT(#{column_name}::geometry, (#{geometry_sql(geographic_item.to_param, geographic_item.geo_object_type)}))" }.join(' and ') where(q) end # @return [Scope] # see are_contained_in_item_by_id # @param [String] column_name # @param [GeographicItem, Array] geographic_items def are_contained_in_item(column_name, *geographic_items) are_contained_in_item_by_id(column_name, geographic_items.flatten.map(&:id)) end # rubocop:disable Metrics/MethodLength # @param [String] column_name to search # @param [GeographicItem] geographic_item_ids or array of geographic_item_ids to be tested. # @return [Scope] of GeographicItems # # If this scope is given an Array of GeographicItems as a second parameter, # it will return the 'OR' of each of the objects against the table. # SELECT COUNT(*) FROM "geographic_items" # WHERE (ST_Contains(polygon::geometry, GeomFromEWKT('srid=4326;POINT (0.0 0.0 0.0)')) # OR ST_Contains(polygon::geometry, GeomFromEWKT('srid=4326;POINT (-9.8 5.0 0.0)'))) # def are_contained_in_item_by_id(column_name, *geographic_item_ids) # = containing geographic_item_ids.flatten! # in case there is a array of arrays, or multiple objects column_name.downcase! case column_name when 'any' part = [] DATA_TYPES.each { |column| unless column == :geometry_collection part.push(GeographicItem.are_contained_in_item_by_id(column.to_s, geographic_item_ids).to_a) end } # TODO: change 'id in (?)' to some other sql construct GeographicItem.where(id: part.flatten.map(&:id)) when 'any_poly', 'any_line' part = [] DATA_TYPES.each { |column| if column.to_s.index(column_name.gsub('any_', '')) part.push(GeographicItem.are_contained_in_item_by_id("#{column}", geographic_item_ids).to_a) end } # TODO: change 'id in (?)' to some other sql construct GeographicItem.where(id: part.flatten.map(&:id)) else q = geographic_item_ids.flatten.collect { |geographic_item_id| # discover the item types, and convert type to database type for 'multi_' b = GeographicItem.where(id: geographic_item_id) .pluck(:type)[0].split(':')[2].downcase.gsub('lti', 'lti_') # a = GeographicItem.find(geographic_item_id).geo_object_type GeographicItem.containing_sql(column_name, geographic_item_id, b) }.join(' or ') q = 'FALSE' if q.blank? # this will prevent the invocation of *ALL* of the GeographicItems, if there are # no GeographicItems in the request (see CollectingEvent.name_hash(types)). where(q) # .not_including(geographic_items) end end # rubocop:enable Metrics/MethodLength # @param [String] column_name # @param [String] geometry of WKT # @return [Scope] # a single WKT geometry is compared against column or columns (except geometry_collection) to find geographic_items # which are contained in the WKT def are_contained_in_wkt(column_name, geometry) column_name.downcase! # column_name = 'point' case column_name when 'any' part = [] DATA_TYPES.each { |column| unless column == :geometry_collection part.push(GeographicItem.are_contained_in_wkt(column.to_s, geometry).pluck(:id).to_a) end } # TODO: change 'id in (?)' to some other sql construct GeographicItem.where(id: part.flatten) when 'any_poly', 'any_line' part = [] DATA_TYPES.each { |column| if column.to_s.index(column_name.gsub('any_', '')) part.push(GeographicItem.are_contained_in_wkt("#{column}", geometry).pluck(:id).to_a) end } # TODO: change 'id in (?)' to some other sql construct GeographicItem.where(id: part.flatten) else # column = points, geometry = square q = "ST_Contains(ST_GeomFromEWKT('srid=4326;#{geometry}'), #{column_name}::geometry)" where(q) # .not_including(geographic_items) end end # rubocop:disable Metrics/MethodLength # containing the items the shape of which is contained in the geographic_item[s] supplied. # @param column_name [String] can be any of DATA_TYPES, or 'any' to check against all types, 'any_poly' to check # against 'polygon' or 'multi_polygon', or 'any_line' to check against 'line_string' or 'multi_line_string'. # CANNOT be 'geometry_collection'. # @param geographic_items [GeographicItem] Can be a single GeographicItem, or an array of GeographicItem. # @return [Scope] def is_contained_by(column_name, *geographic_items) column_name.downcase! case column_name when 'any' part = [] DATA_TYPES.each { |column| unless column == :geometry_collection part.push(GeographicItem.is_contained_by(column.to_s, geographic_items).to_a) end } # @TODO change 'id in (?)' to some other sql construct GeographicItem.where(id: part.flatten.map(&:id)) when 'any_poly', 'any_line' part = [] DATA_TYPES.each { |column| unless column == :geometry_collection if column.to_s.index(column_name.gsub('any_', '')) part.push(GeographicItem.is_contained_by(column.to_s, geographic_items).to_a) end end } # @TODO change 'id in (?)' to some other sql construct GeographicItem.where(id: part.flatten.map(&:id)) else q = geographic_items.flatten.collect { |geographic_item| GeographicItem.reverse_containing_sql(column_name, geographic_item.to_param, geographic_item.geo_object_type) }.join(' or ') where(q) # .not_including(geographic_items) end end # rubocop:enable Metrics/MethodLength # @param [String, GeographicItem] # @return [Scope] def ordered_by_shortest_distance_from(column_name, geographic_item) if true # check_geo_params(column_name, geographic_item) select_distance_with_geo_object(column_name, geographic_item) .where_distance_greater_than_zero(column_name, geographic_item).order('distance') else where('false') end end # @param [String, GeographicItem] # @return [Scope] def ordered_by_longest_distance_from(column_name, geographic_item) if true # check_geo_params(column_name, geographic_item) q = select_distance_with_geo_object(column_name, geographic_item) .where_distance_greater_than_zero(column_name, geographic_item) .order('distance desc') q else where('false') end end # @param [String] column_name # @param [GeographicItem] geographic_item # @return [String] def select_distance_with_geo_object(column_name, geographic_item) select("*, ST_Distance(#{column_name}, GeomFromEWKT('srid=4326;#{geographic_item.geo_object}')) as distance") end # @param [String, GeographicItem] # @return [Scope] def where_distance_greater_than_zero(column_name, geographic_item) where("#{column_name} is not null and ST_Distance(#{column_name}, " \ "GeomFromEWKT('srid=4326;#{geographic_item.geo_object}')) > 0") end # @param [GeographicItem] # @return [Scope] def not_including(geographic_items) where.not(id: geographic_items) end # @return [Scope] # includes an 'is_valid' attribute (True/False) for the passed geographic_item. Uses St_IsValid. # @param [RGeo object] geographic_item def with_is_valid_geometry_column(geographic_item) where(id: geographic_item.id).select("ST_IsValid(ST_AsBinary(#{geographic_item.geo_object_type})) is_valid") end # # Other # # @param [Integer] geographic_item_id1 # @param [Integer] geographic_item_id2 # @return [Float] def distance_between(geographic_item_id1, geographic_item_id2) q1 = "ST_Distance(#{GeographicItem::GEOGRAPHY_SQL}, " \ "(#{select_geography_sql(geographic_item_id2)})) as distance" _q2 = ActiveRecord::Base.send( :sanitize_sql_array, ['ST_Distance(?, (?)) as distance', GeographicItem::GEOGRAPHY_SQL, select_geography_sql(geographic_item_id2)]) GeographicItem.where(id: geographic_item_id1).pluck(Arel.sql(q1)).first end # @param [RGeo::Point] point # @return [Hash] # as per #inferred_geographic_name_hierarchy but for Rgeo point def point_inferred_geographic_name_hierarchy(point) GeographicItem.containing_point(point).order(cached_total_area: :ASC).limit(1).first&.inferred_geographic_name_hierarchy end # @param [String] type_name ('polygon', 'point', 'line' [, 'circle']) # @return [String] if type def eval_for_type(type_name) retval = 'GeographicItem' case type_name.upcase when 'POLYGON' retval += '::Polygon' when 'LINESTRING' retval += '::LineString' when 'POINT' retval += '::Point' when 'MULTIPOLYGON' retval += '::MultiPolygon' when 'MULTILINESTRING' retval += '::MultiLineString' when 'MULTIPOINT' retval += '::MultiPoint' else retval = nil end retval end # example, not used # @param [Integer] geographic_item_id # @return [RGeo::Geographic object] def geometry_for(geographic_item_id) GeographicItem.select(GeographicItem::GEOMETRY_SQL.to_sql + ' AS geometry').find(geographic_item_id)['geometry'] end # example, not used # @param [Integer, Array] geographic_item_ids # @return [Scope] def st_multi(*geographic_item_ids) GeographicItem.find_by_sql( "SELECT ST_Multi(ST_Collect(g.the_geom)) AS singlegeom FROM ( SELECT (ST_DUMP(#{GeographicItem::GEOMETRY_SQL.to_sql})).geom AS the_geom FROM geographic_items WHERE id IN (?)) AS g;", geographic_item_ids.flatten ) end end # class << self # @return [Hash] # a geographic_name_classification or empty Hash # This is a quick approach that works only when # the geographic_item is linked explicitly to a GeographicArea. # # !! Note that it is not impossible for a GeographicItem to be linked # to > 1 GeographicArea, in that case we are assuming that all are # equally refined, this might not be the case in the future because # of how the GeographicArea gazetteer is indexed. def quick_geographic_name_hierarchy geographic_areas.order(:id).each do |ga| h = ga.geographic_name_classification # not quick enough !! return h if h.present? end return {} end # @return [Hash] # a geographic_name_classification (see GeographicArea) inferred by # finding the smallest area containing this GeographicItem, in the most accurate gazetteer # and using it to return country/state/county. See also the logic in # filling in missing levels in GeographicArea. def inferred_geographic_name_hierarchy if small_area = containing_geographic_areas .joins(:geographic_areas_geographic_items) .merge(GeographicAreasGeographicItem.ordered_by_data_origin) .ordered_by_area .limit(1) .first return small_area.geographic_name_classification else {} end end def geographic_name_hierarchy a = quick_geographic_name_hierarchy # quick; almost never the case, UI not setup to do this return a if a.present? inferred_geographic_name_hierarchy # slow end # @return [Scope] # the Geographic Areas that contain (gis) this geographic item def containing_geographic_areas GeographicArea.joins(:geographic_items).includes(:geographic_area_type) .joins("JOIN (#{GeographicItem.containing(id).to_sql}) j on geographic_items.id = j.id") end # @return [Boolean] # whether stored shape is ST_IsValid def valid_geometry? GeographicItem.with_is_valid_geometry_column(self).first['is_valid'] end # @return [Array of latitude, longitude] # the lat, lon of the first point in the GeoItem, see subclass for #st_start_point def start_point o = st_start_point [o.y, o.x] end # @return [Array] # the lat, long, as STRINGs for the centroid of this geographic item # Meh- this: https://postgis.net/docs/en/ST_MinimumBoundingRadius.html def center_coords r = GeographicItem.find_by_sql( "Select split_part(ST_AsLatLonText(ST_Centroid(#{GeographicItem::GEOMETRY_SQL.to_sql}), " \ "'D.DDDDDD'), ' ', 1) latitude, split_part(ST_AsLatLonText(ST_Centroid" \ "(#{GeographicItem::GEOMETRY_SQL.to_sql}), 'D.DDDDDD'), ' ', 2) " \ "longitude from geographic_items where id = #{id};")[0] [r.latitude, r.longitude] end # @return [RGeo::Geographic::ProjectedPointImpl] # representing the centroid of this geographic item def centroid # Gis::FACTORY.point(*center_coords.reverse) return geo_object if type == 'GeographicItem::Point' return Gis::FACTORY.parse_wkt(self.st_centroid) end # @param [Integer] geographic_item_id # @return [Double] distance in meters (slower, more accurate) def st_distance(geographic_item_id) # geo_object q1 = "ST_Distance((#{GeographicItem.select_geography_sql(id)}), " \ "(#{GeographicItem.select_geography_sql(geographic_item_id)})) as d" _q2 = ActiveRecord::Base.send(:sanitize_sql_array, ['ST_Distance((?),(?)) as d', GeographicItem.select_geography_sql(self.id), GeographicItem.select_geography_sql(geographic_item_id)]) deg = GeographicItem.where(id:).pluck(Arel.sql(q1)).first deg * Utilities::Geo::ONE_WEST end # @param [GeographicItem] geographic_item # @return [Double] distance in meters # Like st_distance but works with changed and non persisted objects def st_distance_to_geographic_item(geographic_item) unless !persisted? || changed? a = "(#{GeographicItem.select_geography_sql(id)})" else a = "ST_GeographyFromText('#{geo_object}')" end unless !geographic_item.persisted? || geographic_item.changed? b = "(#{GeographicItem.select_geography_sql(geographic_item.id)})" else b = "ST_GeographyFromText('#{geographic_item.geo_object}')" end ActiveRecord::Base.connection.select_value("SELECT ST_Distance(#{a}, #{b})") end alias_method :distance_to, :st_distance # @param [Integer] geographic_item_id # @return [Double] distance in meters (faster, less accurate) def st_distance_spheroid(geographic_item_id) q1 = "ST_DistanceSpheroid((#{GeographicItem.select_geometry_sql(id)})," \ "(#{GeographicItem.select_geometry_sql(geographic_item_id)}),'#{Gis::SPHEROID}') as distance" _q2 = ActiveRecord::Base.send(:sanitize_sql_array, ['ST_DistanceSpheroid((?),(?),?) as distance', GeographicItem.select_geometry_sql(id), GeographicItem.select_geometry_sql(geographic_item_id), Gis::SPHEROID]) # TODO: what is _q2? GeographicItem.where(id:).pluck(Arel.sql(q1)).first end # @return [String] # a WKT POINT representing the centroid of the geographic item def st_centroid GeographicItem.where(id: to_param).pluck(Arel.sql("ST_AsEWKT(ST_Centroid(#{GeographicItem::GEOMETRY_SQL.to_sql}))")).first.gsub(/SRID=\d*;/, '') end # @return [Integer] # the number of points in the geometry def st_npoints GeographicItem.where(id:).pluck(Arel.sql("ST_NPoints(#{GeographicItem::GEOMETRY_SQL.to_sql}) as npoints")).first end # @return [Symbol] # the geo type (i.e. column like :point, :multipolygon). References the first-found object, # according to the list of DATA_TYPES, or nil def geo_object_type if self.class.name == 'GeographicItem' # a proxy check for new records geo_type else self.class::SHAPE_COLUMN end end # !!TODO: migrate these to use native column calls # @return [RGeo instance, nil] # the Rgeo shape (See http://rubydoc.info/github/dazuma/rgeo/RGeo/Feature) def geo_object begin if r = geo_object_type # rubocop:disable Lint/AssignmentInCondition send(r) else false end rescue RGeo::Error::InvalidGeometry return nil # TODO: we need to render proper error for this! end end # @param [geo_object] # @return [Boolean] def contains?(target_geo_object) return nil if target_geo_object.nil? self.geo_object.contains?(target_geo_object) end # @param [geo_object] # @return [Boolean] def within?(target_geo_object) self.geo_object.within?(target_geo_object) end # @param [geo_object] # @return [Boolean] def intersects?(target_geo_object) self.geo_object.intersects?(target_geo_object) end # @param [geo_object, Double] # @return [Boolean] def near(target_geo_object, distance) self.geo_object.unsafe_buffer(distance).contains?(target_geo_object) end # @param [geo_object, Double] # @return [Boolean] def far(target_geo_object, distance) !near(target_geo_object, distance) end # @return [GeoJSON hash] # via Rgeo apparently necessary for GeometryCollection def rgeo_to_geo_json RGeo::GeoJSON.encode(geo_object).to_json end # @return [Hash] # in GeoJSON format # Computed via "raw" PostGIS (much faster). This # requires the geo_object_type and id. # def to_geo_json JSON.parse( GeographicItem.connection.select_one( "SELECT ST_AsGeoJSON(#{geo_object_type}::geometry) a " \ "FROM geographic_items WHERE id=#{id};")['a']) end # We don't need to serialize to/from JSON def to_geo_json_string GeographicItem.connection.select_one( "SELECT ST_AsGeoJSON(#{geo_object_type}::geometry) a " \ "FROM geographic_items WHERE id=#{id};")['a'] end # @return [Hash] # the shape as a GeoJSON Feature with some item metadata def to_geo_json_feature @geometry ||= to_geo_json {'type' => 'Feature', 'geometry' => geometry, 'properties' => { 'geographic_item' => { 'id' => id} } } end # @param value [String] like: # '{"type":"Feature","geometry":{"type":"Point","coordinates":[2.5,4.0]},"properties":{"color":"red"}}' # # '{"type":"Feature","geometry":{"type":"Polygon","coordinates":"[[[-125.29394388198853, 48.584480409793], # [-67.11035013198853, 45.09937589848195],[-80.64550638198853, 25.01924647619111],[-117.55956888198853, # 32.5591595028449],[-125.29394388198853, 48.584480409793]]]"},"properties":{}}' # # '{"type":"Point","coordinates":[2.5,4.0]},"properties":{"color":"red"}}' # # @return [Boolean, RGeo object] def shape=(value) if value.present? begin geom = RGeo::GeoJSON.decode(value, json_parser: :json, geo_factory: Gis::FACTORY) rescue RGeo::Error::InvalidGeometry => e errors.add(:base, "invalid geometry: #{e.to_s}") return end this_type = nil if geom.respond_to?(:geometry_type) this_type = geom.geometry_type.to_s elsif geom.respond_to?(:geometry) this_type = geom.geometry.geometry_type.to_s else end self.type = GeographicItem.eval_for_type(this_type) unless geom.nil? if type.blank? errors.add(:base, 'type is not set from shape') return end object = nil s = geom.respond_to?(:geometry) ? geom.geometry.to_s : geom.to_s begin object = Gis::FACTORY.parse_wkt(s) rescue RGeo::Error::InvalidGeometry errors.add(:self, 'Shape value is an Invalid Geometry') end write_attribute(this_type.underscore.to_sym, object) geom end end # @return [String] def to_wkt # 10k #<Benchmark::Tms:0x00007fb0dfd30fd0 @label="", @real=25.237487000005785, @cstime=0.0, @cutime=0.0, @stime=1.1704609999999995, @utime=5.507929999999988, @total=6.678390999999987> # GeographicItem.select("ST_AsText( #{GeographicItem::GEOMETRY_SQL.to_sql}) wkt").where(id: id).first.wkt # 10k <Benchmark::Tms:0x00007fb0e02f7540 @label="", @real=21.619827999995323, @cstime=0.0, @cutime=0.0, @stime=0.8850890000000007, @utime=3.2958549999999605, @total=4.180943999999961> if a = ApplicationRecord.connection.execute( "SELECT ST_AsText( #{GeographicItem::GEOMETRY_SQL.to_sql} ) wkt from geographic_items where geographic_items.id = #{id}").first return a['wkt'] else return nil end end # @return [Float] in meters, calculated # TODO: share with world # Geographic item 96862 (Cajamar in Brazil) is the only(?) record to fail using `false` (quicker) method of everything we tested def area a = GeographicItem.where(id:).select("ST_Area(#{GeographicItem::GEOGRAPHY_SQL}, true) as area_in_meters").first['area_in_meters'] a = nil if a.nan? a end # @return [Float, false] # the value in square meters of the interesecting area of this and another GeographicItem def intersecting_area(geographic_item_id) a = GeographicItem.aliased_geographic_sql('a') b = GeographicItem.aliased_geographic_sql('b') c = GeographicItem.connection.execute( "SELECT ST_Area(ST_Intersection(#{a}, #{b})) as intersecting_area FROM geographic_items a, geographic_items b WHERE a.id = #{id} AND b.id = #{geographic_item_id};" ).first c && c['intersecting_area'].to_f end # TODO: This is bad, while internal use of ONE_WEST_MEAN is consistent it is in-accurate given the vast differences of radius vs. lat/long position. # When we strike the error-polygon from radius we should remove this # # Use case is returning the radius from a circle we calculated via buffer for error-polygon creation. def radius r = ApplicationRecord.connection.execute( "SELECT ST_MinimumBoundingRadius( ST_Transform( #{GeographicItem::GEOMETRY_SQL.to_sql}, 4326 ) ) AS radius from geographic_items where geographic_items.id = #{id}").first['radius'].split(',').last.chop.to_f r = (r * Utilities::Geo::ONE_WEST_MEAN).to_i end # Convention is to store in PostGIS in CCW # @return Array [Boolean] # false - cw # true - ccw (preferred), except cee donuts def orientations if multi_polygon.present? ApplicationRecord.connection.execute(" \ SELECT ST_IsPolygonCCW(a.geom) as is_ccw FROM ( SELECT b.id, (ST_Dump(p_geom)).geom AS geom FROM (SELECT id, multi_polygon::geometry AS p_geom FROM geographic_items where id = #{id}) AS b \ ) AS a;").collect{|a| a['is_ccw']} elsif polygon.present? ApplicationRecord.connection.execute("SELECT ST_IsPolygonCCW(polygon::geometry) as is_ccw \ FROM geographic_items where id = #{id};").collect{|a| a['is_ccw']} else [] end end # @return Boolean # looks at all orientations # if they follow the pattern [true, false, ... <all false>] then `true`, else `false` # !! Does not confirm that shapes are nested !! def is_basic_donut? a = orientations b = a.shift return false unless b a.uniq! a == [false] end def st_isvalid r = ApplicationRecord.connection.execute( "SELECT ST_IsValid( #{GeographicItem::GEOMETRY_SQL.to_sql }) from geographic_items where geographic_items.id = #{id}").first['st_isvalid'] end def st_isvalidreason r = ApplicationRecord.connection.execute( "SELECT ST_IsValidReason( #{GeographicItem::GEOMETRY_SQL.to_sql }) from geographic_items where geographic_items.id = #{id}").first['st_isvalidreason'] end # !! Unused. Doesn't check Geometry collection def has_polygons? ['GeographicItem::MultiPolygon', 'GeographicItem::Polygon'].include?(self.type) end private def align_winding if orientations.flatten.include?(false) case type when 'multi_polygon' ApplicationRecord.connection.execute( "UPDATE geographic_items set multi_polygon = ST_ForcePolygonCCW(multi_polygon::geometry) WHERE id = #{self.id};" ) when 'polygon' ApplicationRecord.connection.execute( "UPDATE geographic_items set polygon = ST_ForcePolygonCCW(polygon::geometry) WHERE id = #{self.id};" ) end end true end # Crude debuging helper, write the shapes # to a png def self.debug_draw(geographic_item_ids = []) return false if geographic_item_ids.empty? sql = "SELECT ST_AsPNG( ST_AsRaster( (SELECT ST_Union(multi_polygon::geometry) from geographic_items where id IN (" + geographic_item_ids.join(',') + ")), 1920, 1080 ) ) png;" # ST_Buffer( multi_polygon::geometry, 0, 'join=bevel'), # 1920, # 1080) result = ActiveRecord::Base.connection.execute(sql).first['png'] r = ActiveRecord::Base.connection.unescape_bytea(result) prefix = if geographic_item_ids.size > 10 'multiple' else geographic_item_ids.join('_') + '_debug.draw.png' end n = prefix + '_debug.draw.png' # Open the file in binary write mode ("wb") File.open(n, 'wb') do |file| # Write the binary data to the file file.write(r) end end # def png # if ids = Otu.joins(:cached_map_items).first.cached_map_items.pluck(:geographic_item_id) # sql = "SELECT ST_AsPNG( # ST_AsRaster( # ST_Buffer( multi_polygon::geometry, 0, 'join=bevel'), # 1024, # 768) # ) png # from geographic_items where id IN (" + ids.join(',') + ');' # # hack, not the best way to unpack result # result = ActiveRecord::Base.connection.execute(sql).first['png'] # r = ActiveRecord::Base.connection.unescape_bytea(result) # send_data r, filename: 'foo.png', type: 'imnage/png' # else # render json: {foo: false} # end # end def set_cached update_column(:cached_total_area, area) end # @return [Symbol] # returns the attribute (column name) containing data # nearly all methods should use #geo_object_type, not geo_type def geo_type DATA_TYPES.each { |item| return item if send(item) } nil end # @return [Boolean, String] false if already set, or type to which it was set def set_type_if_geography_present if type.blank? column = geo_type self.type = "GeographicItem::#{column.to_s.camelize}" if column end end # @param [RGeo::Point] point # @return [Array] of a point # Longitude |, Latitude - def point_to_a(point) data = [] data.push(point.x, point.y) data end # @param [RGeo::Point] point # @return [Hash] of a point def point_to_hash(point) {points: [point_to_a(point)]} end # @param [RGeo::MultiPoint] multi_point # @return [Array] of points def multi_point_to_a(multi_point) data = [] multi_point.each { |point| data.push([point.x, point.y]) } data end # @return [Hash] of points def multi_point_to_hash(_multi_point) # when we encounter a multi_point type, we only stick the points into the array, NOT it's identity as a group {points: multi_point_to_a(multi_point)} end # @param [Reo::LineString] line_string # @return [Array] of points in the line def line_string_to_a(line_string) data = [] line_string.points.each { |point| data.push([point.x, point.y]) } data end # @param [Reo::LineString] line_string # @return [Hash] of points in the line def line_string_to_hash(line_string) {lines: [line_string_to_a(line_string)]} end # @param [RGeo::Polygon] polygon # @return [Array] of points in the polygon (exterior_ring ONLY) def polygon_to_a(polygon) # TODO: handle other parts of the polygon; i.e., the interior_rings (if they exist) data = [] polygon.exterior_ring.points.each { |point| data.push([point.x, point.y]) } data end # @param [RGeo::Polygon] polygon # @return [Hash] of points in the polygon (exterior_ring ONLY) def polygon_to_hash(polygon) {polygons: [polygon_to_a(polygon)]} end # @return [Array] of line_strings as arrays of points # @param [RGeo::MultiLineString] multi_line_string def multi_line_string_to_a(multi_line_string) data = [] multi_line_string.each { |line_string| line_data = [] line_string.points.each { |point| line_data.push([point.x, point.y]) } data.push(line_data) } data end # @return [Hash] of line_strings as hashes of points def multi_line_string_to_hash(_multi_line_string) {lines: to_a} end # @param [RGeo::MultiPolygon] multi_polygon # @return [Array] of arrays of points in the polygons (exterior_ring ONLY) def multi_polygon_to_a(multi_polygon) data = [] multi_polygon.each { |polygon| polygon_data = [] polygon.exterior_ring.points.each { |point| polygon_data.push([point.x, point.y]) } data.push(polygon_data) } data end # @return [Hash] of hashes of points in the polygons (exterior_ring ONLY) def multi_polygon_to_hash(_multi_polygon) {polygons: to_a} end # @return [Boolean] iff there is one and only one shape column set def some_data_is_provided data = [] DATA_TYPES.each do |item| data.push(item) if send(item).present? end case data.count when 0 errors.add(:base, 'No shape provided or provided shape is invalid') when 1 return true else data.each do |object| errors.add(object, 'More than one shape type provided') end end true end end |
#geometry ⇒ Hash?
Returns An internal variable for use in super calls, holds a Hash in GeoJSON format (temporarily).
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# File 'app/models/geographic_item.rb', line 49 def geometry @geometry end |
#line_string ⇒ RGeo::Geographic::ProjectedLineStringImpl
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# File 'app/models/geographic_item.rb', line 40 class GeographicItem < ApplicationRecord include Housekeeping::Users include Housekeeping::Timestamps include Shared::HasPapertrail include Shared::IsData include Shared::SharedAcrossProjects # @return [Hash, nil] # An internal variable for use in super calls, holds a Hash in GeoJSON format (temporarily) attr_accessor :geometry # @return [Boolean, RGeo object] # @params value [Hash in GeoJSON format] ?! # TODO: WHY! boolean not nil, or object # Used to build geographic items from a shape [ of what class ] !? attr_accessor :shape # @return [Boolean] # When true cached values are not built attr_accessor :no_cached DATA_TYPES = [ :point, :line_string, :polygon, :multi_point, :multi_line_string, :multi_polygon, :geometry_collection ].freeze GEOMETRY_SQL = Arel::Nodes::Case.new(arel_table[:type]) .when('GeographicItem::MultiPolygon').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:multi_polygon].as('geometry')])) .when('GeographicItem::Point').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:point].as('geometry')])) .when('GeographicItem::LineString').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:line_string].as('geometry')])) .when('GeographicItem::Polygon').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:polygon].as('geometry')])) .when('GeographicItem::MultiLineString').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:multi_line_string].as('geometry')])) .when('GeographicItem::MultiPoint').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:multi_point].as('geometry')])) .when('GeographicItem::GeometryCollection').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:geometry_collection].as('geometry')])) .freeze GEOGRAPHY_SQL = "CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN multi_polygon WHEN 'GeographicItem::Point' THEN point WHEN 'GeographicItem::LineString' THEN line_string WHEN 'GeographicItem::Polygon' THEN polygon WHEN 'GeographicItem::MultiLineString' THEN multi_line_string WHEN 'GeographicItem::MultiPoint' THEN multi_point WHEN 'GeographicItem::GeometryCollection' THEN geometry_collection END".freeze # ANTI_MERIDIAN = '0X0102000020E61000000200000000000000008066400000000000405640000000000080664000000000004056C0' ANTI_MERIDIAN = 'LINESTRING (180 89.0, 180 -89)'.freeze has_many :cached_map_items, inverse_of: :geographic_item has_many :geographic_areas_geographic_items, dependent: :destroy, inverse_of: :geographic_item has_many :geographic_areas, through: :geographic_areas_geographic_items has_many :asserted_distributions, through: :geographic_areas has_many :geographic_area_types, through: :geographic_areas has_many :parent_geographic_areas, through: :geographic_areas, source: :parent has_many :georeferences, inverse_of: :geographic_item has_many :georeferences_through_error_geographic_item, class_name: 'Georeference', foreign_key: :error_geographic_item_id, inverse_of: :error_geographic_item has_many :collecting_events_through_georeferences, through: :georeferences, source: :collecting_event has_many :collecting_events_through_georeference_error_geographic_item, through: :georeferences_through_error_geographic_item, source: :collecting_event # TODO: THIS IS NOT GOOD before_validation :set_type_if_geography_present validate :some_data_is_provided validates :type, presence: true # not needed scope :include_collecting_event, -> { includes(:collecting_events_through_georeferences) } scope :geo_with_collecting_event, -> { joins(:collecting_events_through_georeferences) } scope :err_with_collecting_event, -> { joins(:georeferences_through_error_geographic_item) } after_save :set_cached, unless: Proc.new {|n| n.no_cached || errors.any? } after_save :align_winding class << self def aliased_geographic_sql(name = 'a') "CASE #{name}.type \ WHEN 'GeographicItem::MultiPolygon' THEN #{name}.multi_polygon \ WHEN 'GeographicItem::Point' THEN #{name}.point \ WHEN 'GeographicItem::LineString' THEN #{name}.line_string \ WHEN 'GeographicItem::Polygon' THEN #{name}.polygon \ WHEN 'GeographicItem::MultiLineString' THEN #{name}.multi_line_string \ WHEN 'GeographicItem::MultiPoint' THEN #{name}.multi_point \ WHEN 'GeographicItem::GeometryCollection' THEN #{name}.geometry_collection \ END" end def st_union(geographic_item_scope) GeographicItem.select("ST_Union(#{GeographicItem::GEOMETRY_SQL.to_sql}) as collection") .where(id: geographic_item_scope.pluck(:id)) end def st_collect(geographic_item_scope) GeographicItem.select("ST_Collect(#{GeographicItem::GEOMETRY_SQL.to_sql}) as collection") .where(id: geographic_item_scope.pluck(:id)) end # @return [GeographicItem::ActiveRecord_Relation] # @params [Array] array of geographic area ids def default_by_geographic_area_ids(geographic_area_ids = []) GeographicItem. joins(:geographic_areas_geographic_items). merge(::GeographicAreasGeographicItem.default_geographic_item_data). where(geographic_areas_geographic_items: {geographic_area_id: geographic_area_ids}) end # @param [String] wkt # @return [Boolean] # whether or not the wtk intersects with the anti-meridian # !! StrongParams security considerations def crosses_anti_meridian?(wkt) GeographicItem.find_by_sql( ['SELECT ST_Intersects(ST_GeogFromText(?), ST_GeogFromText(?)) as r;', wkt, ANTI_MERIDIAN] ).first.r end # @param [Integer] ids # @return [Boolean] # whether or not any GeographicItem passed intersects the anti-meridian # !! StrongParams security considerations # This is our first line of defense against queries that define multiple shapes, one or # more of which crosses the anti-meridian. In this case the current TW strategy within the # UI is to abandon the search, and prompt the user to refactor the query. def crosses_anti_meridian_by_id?(*ids) q1 = ["SELECT ST_Intersects((SELECT single_geometry FROM (#{GeographicItem.single_geometry_sql(*ids)}) as " \ 'left_intersect), ST_GeogFromText(?)) as r;', ANTI_MERIDIAN] _q2 = ActiveRecord::Base.send(:sanitize_sql_array, ['SELECT ST_Intersects((SELECT single_geometry FROM (?) as ' \ 'left_intersect), ST_GeogFromText(?)) as r;', GeographicItem.single_geometry_sql(*ids), ANTI_MERIDIAN]) GeographicItem.find_by_sql(q1).first.r end # # SQL fragments # # @param [Integer, String] # @return [String] # a SQL select statement that returns the *geometry* for the geographic_item with the specified id def select_geometry_sql(geographic_item_id) "SELECT #{GeographicItem::GEOMETRY_SQL.to_sql} from geographic_items where geographic_items.id = #{geographic_item_id}" end # @param [Integer, String] # @return [String] # a SQL select statement that returns the geography for the geographic_item with the specified id def select_geography_sql(geographic_item_id) ActiveRecord::Base.send(:sanitize_sql_for_conditions, [ "SELECT #{GeographicItem::GEOMETRY_SQL.to_sql} from geographic_items where geographic_items.id = ?", geographic_item_id]) end # @param [Symbol] choice # @return [String] # a fragment returning either latitude or longitude columns def lat_long_sql(choice) return nil unless [:latitude, :longitude].include?(choice) f = "'D.DDDDDD'" # TODO: probably a constant somewhere v = (choice == :latitude ? 1 : 2) "CASE geographic_items.type WHEN 'GeographicItem::GeometryCollection' THEN split_part(ST_AsLatLonText(ST_Centroid" \ "(geometry_collection::geometry), #{f}), ' ', #{v}) WHEN 'GeographicItem::LineString' THEN split_part(ST_AsLatLonText(ST_Centroid(line_string::geometry), " \ "#{f}), ' ', #{v}) WHEN 'GeographicItem::MultiPolygon' THEN split_part(ST_AsLatLonText(" \ "ST_Centroid(multi_polygon::geometry), #{f}), ' ', #{v}) WHEN 'GeographicItem::Point' THEN split_part(ST_AsLatLonText(" \ "ST_Centroid(point::geometry), #{f}), ' ', #{v}) WHEN 'GeographicItem::Polygon' THEN split_part(ST_AsLatLonText(" \ "ST_Centroid(polygon::geometry), #{f}), ' ', #{v}) WHEN 'GeographicItem::MultiLineString' THEN split_part(ST_AsLatLonText(" \ "ST_Centroid(multi_line_string::geometry), #{f} ), ' ', #{v}) WHEN 'GeographicItem::MultiPoint' THEN split_part(ST_AsLatLonText(" \ "ST_Centroid(multi_point::geometry), #{f}), ' ', #{v}) END as #{choice}" end # @param [Integer] geographic_item_id # @param [Integer] distance # @return [String] def within_radius_of_item_sql(geographic_item_id, distance) "ST_DWithin((#{GeographicItem::GEOGRAPHY_SQL}), (#{select_geography_sql(geographic_item_id)}), #{distance})" end # @param [Integer] geographic_item_id # @param [Number] distance in meters to grow/shrink the shape (negative allowed) # @param [Number] distance (in meters) (positive only?!) # @return [String] def st_buffer_st_within(geographic_item_id, distance, buffer = 0) "ST_DWithin( ST_Buffer(#{GeographicItem::GEOGRAPHY_SQL}, #{buffer}), (#{select_geography_sql(geographic_item_id)}), #{distance} )" end # TODO: 3D is overkill here # @param [String] wkt # @param [Integer] distance (meters) # @return [String] # !! This is intersecting def intersecting_radius_of_wkt_sql(wkt, distance) "ST_DWithin((#{GeographicItem::GEOGRAPHY_SQL}), ST_Transform( ST_GeomFromText('#{wkt}', " \ "4326), 4326), #{distance})" end # @param [String] wkt # @param [Integer] distance (meters) # @return [String] # !! This is fully covering def within_radius_of_wkt_sql(wkt, distance) "ST_Covers( ST_Buffer(ST_SetSRID( ST_GeomFromText('#{wkt}'), 4326)::geography, #{distance}), (#{GeographicItem::GEOGRAPHY_SQL}))" end # @param [String, Integer, String] # @return [String] # a SQL fragment for ST_Contains() function, returns # all geographic items which are contained in the item supplied def containing_sql(target_column_name = nil, geographic_item_id = nil, source_column_name = nil) return 'false' if geographic_item_id.nil? || source_column_name.nil? || target_column_name.nil? "ST_Contains(#{target_column_name}::geometry, (#{geometry_sql(geographic_item_id, source_column_name)}))" end # @param [String, Integer, String] # @return [String] # a SQL fragment for ST_Contains(), returns # all geographic_items which contain the supplied geographic_item def reverse_containing_sql(target_column_name = nil, geographic_item_id = nil, source_column_name = nil) return 'false' if geographic_item_id.nil? || source_column_name.nil? || target_column_name.nil? "ST_Contains((#{geometry_sql(geographic_item_id, source_column_name)}), #{target_column_name}::geometry)" end # @param [Integer, String] # @return [String] # a SQL fragment that represents the geometry of the geographic item specified (which has data in the # source_column_name, i.e. geo_object_type) def geometry_sql(geographic_item_id = nil, source_column_name = nil) return 'false' if geographic_item_id.nil? || source_column_name.nil? "select geom_alias_tbl.#{source_column_name}::geometry from geographic_items geom_alias_tbl " \ "where geom_alias_tbl.id = #{geographic_item_id}" end # rubocop:disable Metrics/MethodLength # @param [String] column_name # @param [GeographicItem] geographic_item # @return [String] of SQL def is_contained_by_sql(column_name, geographic_item) geo_id = geographic_item.id geo_type = geographic_item.geo_object_type template = '(ST_Contains((select geographic_items.%s::geometry from geographic_items where ' \ 'geographic_items.id = %d), %s::geometry))' retval = [] column_name.downcase! case column_name when 'any' DATA_TYPES.each { |column| unless column == :geometry_collection retval.push(template % [geo_type, geo_id, column]) end } when 'any_poly', 'any_line' DATA_TYPES.each { |column| unless column == :geometry_collection if column.to_s.index(column_name.gsub('any_', '')) retval.push(template % [geo_type, geo_id, column]) end end } else retval = template % [geo_type, geo_id, column_name] end retval = retval.join(' OR ') if retval.instance_of?(Array) retval end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] # a select query that returns a single geometry (column name 'single_geometry' for the collection of ids # provided via ST_Collect) def st_collect_sql(*geographic_item_ids) geographic_item_ids.flatten! ActiveRecord::Base.send(:sanitize_sql_for_conditions, [ "SELECT ST_Collect(f.the_geom) AS single_geometry FROM ( SELECT (ST_DUMP(#{GeographicItem::GEOMETRY_SQL.to_sql})).geom as the_geom FROM geographic_items WHERE id in (?)) AS f", geographic_item_ids]) end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] # returns one or more geographic items combined as a single geometry in column 'single' def single_geometry_sql(*geographic_item_ids) a = GeographicItem.st_collect_sql(geographic_item_ids) '(SELECT single.single_geometry FROM (' + a + ' ) AS single)' end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] # returns a single geometry "column" (paren wrapped) as "single" for multiple geographic item ids, or the # geometry as 'geometry' for a single id def geometry_sql2(*geographic_item_ids) geographic_item_ids.flatten! # *ALWAYS* reduce the pile to a single level of ids if geographic_item_ids.count == 1 "(#{GeographicItem.geometry_for_sql(geographic_item_ids.first)})" else GeographicItem.single_geometry_sql(geographic_item_ids) end end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] def containing_where_sql(*geographic_item_ids) "ST_CoveredBy( #{GeographicItem.geometry_sql2(*geographic_item_ids)}, CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN multi_polygon::geometry WHEN 'GeographicItem::Point' THEN point::geometry WHEN 'GeographicItem::LineString' THEN line_string::geometry WHEN 'GeographicItem::Polygon' THEN polygon::geometry WHEN 'GeographicItem::MultiLineString' THEN multi_line_string::geometry WHEN 'GeographicItem::MultiPoint' THEN multi_point::geometry END)" end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] def containing_where_sql_geog(*geographic_item_ids) "ST_CoveredBy( #{GeographicItem.geometry_sql2(*geographic_item_ids)}, CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN multi_polygon::geography WHEN 'GeographicItem::Point' THEN point::geography WHEN 'GeographicItem::LineString' THEN line_string::geography WHEN 'GeographicItem::Polygon' THEN polygon::geography WHEN 'GeographicItem::MultiLineString' THEN multi_line_string::geography WHEN 'GeographicItem::MultiPoint' THEN multi_point::geography END)" end # @param [Interger, Array of Integer] ids # @return [Array] # If we detect that some query id has crossed the meridian, then loop through # and "manually" build up a list of results. # Should only be used if GeographicItem.crosses_anti_meridian_by_id? is true. # Note that this does not return a Scope, so you can't chain it like contained_by? # TODO: test this def contained_by_with_antimeridian_check(*ids) ids.flatten! # make sure there is only one level of splat (*) results = [] crossing_ids = [] ids.each do |id| # push each which crosses crossing_ids.push(id) if GeographicItem.crosses_anti_meridian_by_id?(id) end non_crossing_ids = ids - crossing_ids results.push GeographicItem.contained_by(non_crossing_ids).to_a if non_crossing_ids.any? crossing_ids.each do |id| # [61666, 61661, 61659, 61654, 61639] q1 = ActiveRecord::Base.send(:sanitize_sql_array, ['SELECT ST_AsText((SELECT polygon FROM geographic_items ' \ 'WHERE id = ?))', id]) r = GeographicItem.where( # GeographicItem.contained_by_wkt_shifted_sql(GeographicItem.find(id).geo_object.to_s) GeographicItem.contained_by_wkt_shifted_sql( ApplicationRecord.connection.execute(q1).first['st_astext']) ).to_a results.push(r) end results.flatten.uniq end # @params [String] well known text # @return [String] the SQL fragment for the specific geometry type, shifted by longitude # Note: this routine is called when it is already known that the A argument crosses anti-meridian def contained_by_wkt_shifted_sql(wkt) "ST_Contains(ST_ShiftLongitude(ST_GeomFromText('#{wkt}', 4326)), ( CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN ST_ShiftLongitude(multi_polygon::geometry) WHEN 'GeographicItem::Point' THEN ST_ShiftLongitude(point::geometry) WHEN 'GeographicItem::LineString' THEN ST_ShiftLongitude(line_string::geometry) WHEN 'GeographicItem::Polygon' THEN ST_ShiftLongitude(polygon::geometry) WHEN 'GeographicItem::MultiLineString' THEN ST_ShiftLongitude(multi_line_string::geometry) WHEN 'GeographicItem::MultiPoint' THEN ST_ShiftLongitude(multi_point::geometry) END ) )" end # TODO: Remove the hard coded 4326 reference # @params [String] wkt # @return [String] SQL fragment limiting geographics items to those in this WKT def contained_by_wkt_sql(wkt) if crosses_anti_meridian?(wkt) retval = contained_by_wkt_shifted_sql(wkt) else retval = "ST_Contains(ST_GeomFromText('#{wkt}', 4326), ( CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN multi_polygon::geometry WHEN 'GeographicItem::Point' THEN point::geometry WHEN 'GeographicItem::LineString' THEN line_string::geometry WHEN 'GeographicItem::Polygon' THEN polygon::geometry WHEN 'GeographicItem::MultiLineString' THEN multi_line_string::geometry WHEN 'GeographicItem::MultiPoint' THEN multi_point::geometry END ) )" end retval end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] sql for contained_by via ST_ContainsProperly # Note: Can not use GEOMETRY_SQL because geometry_collection is not supported in ST_ContainsProperly # Note: !! If the target GeographicItem#id crosses the anti-meridian then you may/will get unexpected results. def contained_by_where_sql(*geographic_item_ids) "ST_Contains( #{GeographicItem.geometry_sql2(*geographic_item_ids)}, CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN multi_polygon::geometry WHEN 'GeographicItem::Point' THEN point::geometry WHEN 'GeographicItem::LineString' THEN line_string::geometry WHEN 'GeographicItem::Polygon' THEN polygon::geometry WHEN 'GeographicItem::MultiLineString' THEN multi_line_string::geometry WHEN 'GeographicItem::MultiPoint' THEN multi_point::geometry END)" end # @param [RGeo:Point] rgeo_point # @return [String] sql for containing via ST_CoveredBy # TODO: Remove the hard coded 4326 reference # TODO: should this be wkt_point instead of rgeo_point? def containing_where_for_point_sql(rgeo_point) "ST_CoveredBy( ST_GeomFromText('#{rgeo_point}', 4326), #{GeographicItem::GEOMETRY_SQL.to_sql} )" end # @param [Interger] geographic_item_id # @return [String] SQL for geometries # example, not used def geometry_for_sql(geographic_item_id) 'SELECT ' + GeographicItem::GEOMETRY_SQL.to_sql + ' AS geometry FROM geographic_items WHERE id = ' \ "#{geographic_item_id} LIMIT 1" end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] SQL for geometries # example, not used def geometry_for_collection_sql(*geographic_item_ids) 'SELECT ' + GeographicItem::GEOMETRY_SQL.to_sql + ' AS geometry FROM geographic_items WHERE id IN ' \ "( #{geographic_item_ids.join(',')} )" end # # Scopes # # @param [Interger, Array of Integer] geographic_item_ids # @return [Scope] # the geographic items containing these collective geographic_item ids, not including self def containing(*geographic_item_ids) where(GeographicItem.containing_where_sql(geographic_item_ids)).not_ids(*geographic_item_ids) end # @param [Interger, Array of Integer] geographic_item_ids # @return [Scope] # the geographic items contained by any of these geographic_item ids, not including self # (works via ST_ContainsProperly) def contained_by(*geographic_item_ids) where(GeographicItem.contained_by_where_sql(geographic_item_ids)) end # @param [RGeo::Point] rgeo_point # @return [Scope] # the geographic items containing this point # TODO: should be containing_wkt ? def containing_point(rgeo_point) where(GeographicItem.containing_where_for_point_sql(rgeo_point)) end # @return [Scope] # adds an area_in_meters field, with meters def with_area select("ST_Area(#{GeographicItem::GEOGRAPHY_SQL}, false) as area_in_meters") end # return [Scope] # A scope that limits the result to those GeographicItems that have a collecting event # through either the geographic_item or the error_geographic_item # # A raw SQL join approach for comparison # # GeographicItem.joins('LEFT JOIN georeferences g1 ON geographic_items.id = g1.geographic_item_id'). # joins('LEFT JOIN georeferences g2 ON geographic_items.id = g2.error_geographic_item_id'). # where("(g1.geographic_item_id IS NOT NULL OR g2.error_geographic_item_id IS NOT NULL)").uniq # @return [Scope] GeographicItem # This uses an Arel table approach, this is ultimately more decomposable if we need. Of use: # http://danshultz.github.io/talks/mastering_activerecord_arel <- best # https://github.com/rails/arel # http://stackoverflow.com/questions/4500629/use-arel-for-a-nested-set-join-query-and-convert-to-activerecordrelation # http://rdoc.info/github/rails/arel/Arel/SelectManager # http://stackoverflow.com/questions/7976358/activerecord-arel-or-condition # def with_collecting_event_through_georeferences geographic_items = GeographicItem.arel_table georeferences = Georeference.arel_table g1 = georeferences.alias('a') g2 = georeferences.alias('b') c = geographic_items.join(g1, Arel::Nodes::OuterJoin).on(geographic_items[:id].eq(g1[:geographic_item_id])) .join(g2, Arel::Nodes::OuterJoin).on(geographic_items[:id].eq(g2[:error_geographic_item_id])) GeographicItem.joins(# turn the Arel back into scope c.join_sources # translate the Arel join to a join hash(?) ).where( g1[:id].not_eq(nil).or(g2[:id].not_eq(nil)) # returns a Arel::Nodes::Grouping ).distinct end # @return [Scope] include a 'latitude' column def with_latitude select(lat_long_sql(:latitude)) end # @return [Scope] include a 'longitude' column def with_longitude select(lat_long_sql(:longitude)) end # @param [String, GeographicItems] # @return [Scope] def intersecting(column_name, *geographic_items) if column_name.downcase == 'any' pieces = [] DATA_TYPES.each { |column| pieces.push(GeographicItem.intersecting(column.to_s, geographic_items).to_a) } # @TODO change 'id in (?)' to some other sql construct GeographicItem.where(id: pieces.flatten.map(&:id)) else q = geographic_items.flatten.collect { |geographic_item| "ST_Intersects(#{column_name}, '#{geographic_item.geo_object}' )" # seems like we want this: http://danshultz.github.io/talks/mastering_activerecord_arel/#/15/2 }.join(' or ') where(q) end end # @param [GeographicItem#id] geographic_item_id # @param [Float] distance in meters ?!?! # @return [ActiveRecord::Relation] # !! should be distance, not radius?! def within_radius_of_item(geographic_item_id, distance) where(within_radius_of_item_sql(geographic_item_id, distance)) end # @param [String, GeographicItem] # @return [Scope] # a SQL fragment for ST_DISJOINT, specifies all geographic_items that have data in column_name # that are disjoint from the passed geographic_items def disjoint_from(column_name, *geographic_items) q = geographic_items.flatten.collect { |geographic_item| "ST_DISJOINT(#{column_name}::geometry, (#{geometry_sql(geographic_item.to_param, geographic_item.geo_object_type)}))" }.join(' and ') where(q) end # @return [Scope] # see are_contained_in_item_by_id # @param [String] column_name # @param [GeographicItem, Array] geographic_items def are_contained_in_item(column_name, *geographic_items) are_contained_in_item_by_id(column_name, geographic_items.flatten.map(&:id)) end # rubocop:disable Metrics/MethodLength # @param [String] column_name to search # @param [GeographicItem] geographic_item_ids or array of geographic_item_ids to be tested. # @return [Scope] of GeographicItems # # If this scope is given an Array of GeographicItems as a second parameter, # it will return the 'OR' of each of the objects against the table. # SELECT COUNT(*) FROM "geographic_items" # WHERE (ST_Contains(polygon::geometry, GeomFromEWKT('srid=4326;POINT (0.0 0.0 0.0)')) # OR ST_Contains(polygon::geometry, GeomFromEWKT('srid=4326;POINT (-9.8 5.0 0.0)'))) # def are_contained_in_item_by_id(column_name, *geographic_item_ids) # = containing geographic_item_ids.flatten! # in case there is a array of arrays, or multiple objects column_name.downcase! case column_name when 'any' part = [] DATA_TYPES.each { |column| unless column == :geometry_collection part.push(GeographicItem.are_contained_in_item_by_id(column.to_s, geographic_item_ids).to_a) end } # TODO: change 'id in (?)' to some other sql construct GeographicItem.where(id: part.flatten.map(&:id)) when 'any_poly', 'any_line' part = [] DATA_TYPES.each { |column| if column.to_s.index(column_name.gsub('any_', '')) part.push(GeographicItem.are_contained_in_item_by_id("#{column}", geographic_item_ids).to_a) end } # TODO: change 'id in (?)' to some other sql construct GeographicItem.where(id: part.flatten.map(&:id)) else q = geographic_item_ids.flatten.collect { |geographic_item_id| # discover the item types, and convert type to database type for 'multi_' b = GeographicItem.where(id: geographic_item_id) .pluck(:type)[0].split(':')[2].downcase.gsub('lti', 'lti_') # a = GeographicItem.find(geographic_item_id).geo_object_type GeographicItem.containing_sql(column_name, geographic_item_id, b) }.join(' or ') q = 'FALSE' if q.blank? # this will prevent the invocation of *ALL* of the GeographicItems, if there are # no GeographicItems in the request (see CollectingEvent.name_hash(types)). where(q) # .not_including(geographic_items) end end # rubocop:enable Metrics/MethodLength # @param [String] column_name # @param [String] geometry of WKT # @return [Scope] # a single WKT geometry is compared against column or columns (except geometry_collection) to find geographic_items # which are contained in the WKT def are_contained_in_wkt(column_name, geometry) column_name.downcase! # column_name = 'point' case column_name when 'any' part = [] DATA_TYPES.each { |column| unless column == :geometry_collection part.push(GeographicItem.are_contained_in_wkt(column.to_s, geometry).pluck(:id).to_a) end } # TODO: change 'id in (?)' to some other sql construct GeographicItem.where(id: part.flatten) when 'any_poly', 'any_line' part = [] DATA_TYPES.each { |column| if column.to_s.index(column_name.gsub('any_', '')) part.push(GeographicItem.are_contained_in_wkt("#{column}", geometry).pluck(:id).to_a) end } # TODO: change 'id in (?)' to some other sql construct GeographicItem.where(id: part.flatten) else # column = points, geometry = square q = "ST_Contains(ST_GeomFromEWKT('srid=4326;#{geometry}'), #{column_name}::geometry)" where(q) # .not_including(geographic_items) end end # rubocop:disable Metrics/MethodLength # containing the items the shape of which is contained in the geographic_item[s] supplied. # @param column_name [String] can be any of DATA_TYPES, or 'any' to check against all types, 'any_poly' to check # against 'polygon' or 'multi_polygon', or 'any_line' to check against 'line_string' or 'multi_line_string'. # CANNOT be 'geometry_collection'. # @param geographic_items [GeographicItem] Can be a single GeographicItem, or an array of GeographicItem. # @return [Scope] def is_contained_by(column_name, *geographic_items) column_name.downcase! case column_name when 'any' part = [] DATA_TYPES.each { |column| unless column == :geometry_collection part.push(GeographicItem.is_contained_by(column.to_s, geographic_items).to_a) end } # @TODO change 'id in (?)' to some other sql construct GeographicItem.where(id: part.flatten.map(&:id)) when 'any_poly', 'any_line' part = [] DATA_TYPES.each { |column| unless column == :geometry_collection if column.to_s.index(column_name.gsub('any_', '')) part.push(GeographicItem.is_contained_by(column.to_s, geographic_items).to_a) end end } # @TODO change 'id in (?)' to some other sql construct GeographicItem.where(id: part.flatten.map(&:id)) else q = geographic_items.flatten.collect { |geographic_item| GeographicItem.reverse_containing_sql(column_name, geographic_item.to_param, geographic_item.geo_object_type) }.join(' or ') where(q) # .not_including(geographic_items) end end # rubocop:enable Metrics/MethodLength # @param [String, GeographicItem] # @return [Scope] def ordered_by_shortest_distance_from(column_name, geographic_item) if true # check_geo_params(column_name, geographic_item) select_distance_with_geo_object(column_name, geographic_item) .where_distance_greater_than_zero(column_name, geographic_item).order('distance') else where('false') end end # @param [String, GeographicItem] # @return [Scope] def ordered_by_longest_distance_from(column_name, geographic_item) if true # check_geo_params(column_name, geographic_item) q = select_distance_with_geo_object(column_name, geographic_item) .where_distance_greater_than_zero(column_name, geographic_item) .order('distance desc') q else where('false') end end # @param [String] column_name # @param [GeographicItem] geographic_item # @return [String] def select_distance_with_geo_object(column_name, geographic_item) select("*, ST_Distance(#{column_name}, GeomFromEWKT('srid=4326;#{geographic_item.geo_object}')) as distance") end # @param [String, GeographicItem] # @return [Scope] def where_distance_greater_than_zero(column_name, geographic_item) where("#{column_name} is not null and ST_Distance(#{column_name}, " \ "GeomFromEWKT('srid=4326;#{geographic_item.geo_object}')) > 0") end # @param [GeographicItem] # @return [Scope] def not_including(geographic_items) where.not(id: geographic_items) end # @return [Scope] # includes an 'is_valid' attribute (True/False) for the passed geographic_item. Uses St_IsValid. # @param [RGeo object] geographic_item def with_is_valid_geometry_column(geographic_item) where(id: geographic_item.id).select("ST_IsValid(ST_AsBinary(#{geographic_item.geo_object_type})) is_valid") end # # Other # # @param [Integer] geographic_item_id1 # @param [Integer] geographic_item_id2 # @return [Float] def distance_between(geographic_item_id1, geographic_item_id2) q1 = "ST_Distance(#{GeographicItem::GEOGRAPHY_SQL}, " \ "(#{select_geography_sql(geographic_item_id2)})) as distance" _q2 = ActiveRecord::Base.send( :sanitize_sql_array, ['ST_Distance(?, (?)) as distance', GeographicItem::GEOGRAPHY_SQL, select_geography_sql(geographic_item_id2)]) GeographicItem.where(id: geographic_item_id1).pluck(Arel.sql(q1)).first end # @param [RGeo::Point] point # @return [Hash] # as per #inferred_geographic_name_hierarchy but for Rgeo point def point_inferred_geographic_name_hierarchy(point) GeographicItem.containing_point(point).order(cached_total_area: :ASC).limit(1).first&.inferred_geographic_name_hierarchy end # @param [String] type_name ('polygon', 'point', 'line' [, 'circle']) # @return [String] if type def eval_for_type(type_name) retval = 'GeographicItem' case type_name.upcase when 'POLYGON' retval += '::Polygon' when 'LINESTRING' retval += '::LineString' when 'POINT' retval += '::Point' when 'MULTIPOLYGON' retval += '::MultiPolygon' when 'MULTILINESTRING' retval += '::MultiLineString' when 'MULTIPOINT' retval += '::MultiPoint' else retval = nil end retval end # example, not used # @param [Integer] geographic_item_id # @return [RGeo::Geographic object] def geometry_for(geographic_item_id) GeographicItem.select(GeographicItem::GEOMETRY_SQL.to_sql + ' AS geometry').find(geographic_item_id)['geometry'] end # example, not used # @param [Integer, Array] geographic_item_ids # @return [Scope] def st_multi(*geographic_item_ids) GeographicItem.find_by_sql( "SELECT ST_Multi(ST_Collect(g.the_geom)) AS singlegeom FROM ( SELECT (ST_DUMP(#{GeographicItem::GEOMETRY_SQL.to_sql})).geom AS the_geom FROM geographic_items WHERE id IN (?)) AS g;", geographic_item_ids.flatten ) end end # class << self # @return [Hash] # a geographic_name_classification or empty Hash # This is a quick approach that works only when # the geographic_item is linked explicitly to a GeographicArea. # # !! Note that it is not impossible for a GeographicItem to be linked # to > 1 GeographicArea, in that case we are assuming that all are # equally refined, this might not be the case in the future because # of how the GeographicArea gazetteer is indexed. def quick_geographic_name_hierarchy geographic_areas.order(:id).each do |ga| h = ga.geographic_name_classification # not quick enough !! return h if h.present? end return {} end # @return [Hash] # a geographic_name_classification (see GeographicArea) inferred by # finding the smallest area containing this GeographicItem, in the most accurate gazetteer # and using it to return country/state/county. See also the logic in # filling in missing levels in GeographicArea. def inferred_geographic_name_hierarchy if small_area = containing_geographic_areas .joins(:geographic_areas_geographic_items) .merge(GeographicAreasGeographicItem.ordered_by_data_origin) .ordered_by_area .limit(1) .first return small_area.geographic_name_classification else {} end end def geographic_name_hierarchy a = quick_geographic_name_hierarchy # quick; almost never the case, UI not setup to do this return a if a.present? inferred_geographic_name_hierarchy # slow end # @return [Scope] # the Geographic Areas that contain (gis) this geographic item def containing_geographic_areas GeographicArea.joins(:geographic_items).includes(:geographic_area_type) .joins("JOIN (#{GeographicItem.containing(id).to_sql}) j on geographic_items.id = j.id") end # @return [Boolean] # whether stored shape is ST_IsValid def valid_geometry? GeographicItem.with_is_valid_geometry_column(self).first['is_valid'] end # @return [Array of latitude, longitude] # the lat, lon of the first point in the GeoItem, see subclass for #st_start_point def start_point o = st_start_point [o.y, o.x] end # @return [Array] # the lat, long, as STRINGs for the centroid of this geographic item # Meh- this: https://postgis.net/docs/en/ST_MinimumBoundingRadius.html def center_coords r = GeographicItem.find_by_sql( "Select split_part(ST_AsLatLonText(ST_Centroid(#{GeographicItem::GEOMETRY_SQL.to_sql}), " \ "'D.DDDDDD'), ' ', 1) latitude, split_part(ST_AsLatLonText(ST_Centroid" \ "(#{GeographicItem::GEOMETRY_SQL.to_sql}), 'D.DDDDDD'), ' ', 2) " \ "longitude from geographic_items where id = #{id};")[0] [r.latitude, r.longitude] end # @return [RGeo::Geographic::ProjectedPointImpl] # representing the centroid of this geographic item def centroid # Gis::FACTORY.point(*center_coords.reverse) return geo_object if type == 'GeographicItem::Point' return Gis::FACTORY.parse_wkt(self.st_centroid) end # @param [Integer] geographic_item_id # @return [Double] distance in meters (slower, more accurate) def st_distance(geographic_item_id) # geo_object q1 = "ST_Distance((#{GeographicItem.select_geography_sql(id)}), " \ "(#{GeographicItem.select_geography_sql(geographic_item_id)})) as d" _q2 = ActiveRecord::Base.send(:sanitize_sql_array, ['ST_Distance((?),(?)) as d', GeographicItem.select_geography_sql(self.id), GeographicItem.select_geography_sql(geographic_item_id)]) deg = GeographicItem.where(id:).pluck(Arel.sql(q1)).first deg * Utilities::Geo::ONE_WEST end # @param [GeographicItem] geographic_item # @return [Double] distance in meters # Like st_distance but works with changed and non persisted objects def st_distance_to_geographic_item(geographic_item) unless !persisted? || changed? a = "(#{GeographicItem.select_geography_sql(id)})" else a = "ST_GeographyFromText('#{geo_object}')" end unless !geographic_item.persisted? || geographic_item.changed? b = "(#{GeographicItem.select_geography_sql(geographic_item.id)})" else b = "ST_GeographyFromText('#{geographic_item.geo_object}')" end ActiveRecord::Base.connection.select_value("SELECT ST_Distance(#{a}, #{b})") end alias_method :distance_to, :st_distance # @param [Integer] geographic_item_id # @return [Double] distance in meters (faster, less accurate) def st_distance_spheroid(geographic_item_id) q1 = "ST_DistanceSpheroid((#{GeographicItem.select_geometry_sql(id)})," \ "(#{GeographicItem.select_geometry_sql(geographic_item_id)}),'#{Gis::SPHEROID}') as distance" _q2 = ActiveRecord::Base.send(:sanitize_sql_array, ['ST_DistanceSpheroid((?),(?),?) as distance', GeographicItem.select_geometry_sql(id), GeographicItem.select_geometry_sql(geographic_item_id), Gis::SPHEROID]) # TODO: what is _q2? GeographicItem.where(id:).pluck(Arel.sql(q1)).first end # @return [String] # a WKT POINT representing the centroid of the geographic item def st_centroid GeographicItem.where(id: to_param).pluck(Arel.sql("ST_AsEWKT(ST_Centroid(#{GeographicItem::GEOMETRY_SQL.to_sql}))")).first.gsub(/SRID=\d*;/, '') end # @return [Integer] # the number of points in the geometry def st_npoints GeographicItem.where(id:).pluck(Arel.sql("ST_NPoints(#{GeographicItem::GEOMETRY_SQL.to_sql}) as npoints")).first end # @return [Symbol] # the geo type (i.e. column like :point, :multipolygon). References the first-found object, # according to the list of DATA_TYPES, or nil def geo_object_type if self.class.name == 'GeographicItem' # a proxy check for new records geo_type else self.class::SHAPE_COLUMN end end # !!TODO: migrate these to use native column calls # @return [RGeo instance, nil] # the Rgeo shape (See http://rubydoc.info/github/dazuma/rgeo/RGeo/Feature) def geo_object begin if r = geo_object_type # rubocop:disable Lint/AssignmentInCondition send(r) else false end rescue RGeo::Error::InvalidGeometry return nil # TODO: we need to render proper error for this! end end # @param [geo_object] # @return [Boolean] def contains?(target_geo_object) return nil if target_geo_object.nil? self.geo_object.contains?(target_geo_object) end # @param [geo_object] # @return [Boolean] def within?(target_geo_object) self.geo_object.within?(target_geo_object) end # @param [geo_object] # @return [Boolean] def intersects?(target_geo_object) self.geo_object.intersects?(target_geo_object) end # @param [geo_object, Double] # @return [Boolean] def near(target_geo_object, distance) self.geo_object.unsafe_buffer(distance).contains?(target_geo_object) end # @param [geo_object, Double] # @return [Boolean] def far(target_geo_object, distance) !near(target_geo_object, distance) end # @return [GeoJSON hash] # via Rgeo apparently necessary for GeometryCollection def rgeo_to_geo_json RGeo::GeoJSON.encode(geo_object).to_json end # @return [Hash] # in GeoJSON format # Computed via "raw" PostGIS (much faster). This # requires the geo_object_type and id. # def to_geo_json JSON.parse( GeographicItem.connection.select_one( "SELECT ST_AsGeoJSON(#{geo_object_type}::geometry) a " \ "FROM geographic_items WHERE id=#{id};")['a']) end # We don't need to serialize to/from JSON def to_geo_json_string GeographicItem.connection.select_one( "SELECT ST_AsGeoJSON(#{geo_object_type}::geometry) a " \ "FROM geographic_items WHERE id=#{id};")['a'] end # @return [Hash] # the shape as a GeoJSON Feature with some item metadata def to_geo_json_feature @geometry ||= to_geo_json {'type' => 'Feature', 'geometry' => geometry, 'properties' => { 'geographic_item' => { 'id' => id} } } end # @param value [String] like: # '{"type":"Feature","geometry":{"type":"Point","coordinates":[2.5,4.0]},"properties":{"color":"red"}}' # # '{"type":"Feature","geometry":{"type":"Polygon","coordinates":"[[[-125.29394388198853, 48.584480409793], # [-67.11035013198853, 45.09937589848195],[-80.64550638198853, 25.01924647619111],[-117.55956888198853, # 32.5591595028449],[-125.29394388198853, 48.584480409793]]]"},"properties":{}}' # # '{"type":"Point","coordinates":[2.5,4.0]},"properties":{"color":"red"}}' # # @return [Boolean, RGeo object] def shape=(value) if value.present? begin geom = RGeo::GeoJSON.decode(value, json_parser: :json, geo_factory: Gis::FACTORY) rescue RGeo::Error::InvalidGeometry => e errors.add(:base, "invalid geometry: #{e.to_s}") return end this_type = nil if geom.respond_to?(:geometry_type) this_type = geom.geometry_type.to_s elsif geom.respond_to?(:geometry) this_type = geom.geometry.geometry_type.to_s else end self.type = GeographicItem.eval_for_type(this_type) unless geom.nil? if type.blank? errors.add(:base, 'type is not set from shape') return end object = nil s = geom.respond_to?(:geometry) ? geom.geometry.to_s : geom.to_s begin object = Gis::FACTORY.parse_wkt(s) rescue RGeo::Error::InvalidGeometry errors.add(:self, 'Shape value is an Invalid Geometry') end write_attribute(this_type.underscore.to_sym, object) geom end end # @return [String] def to_wkt # 10k #<Benchmark::Tms:0x00007fb0dfd30fd0 @label="", @real=25.237487000005785, @cstime=0.0, @cutime=0.0, @stime=1.1704609999999995, @utime=5.507929999999988, @total=6.678390999999987> # GeographicItem.select("ST_AsText( #{GeographicItem::GEOMETRY_SQL.to_sql}) wkt").where(id: id).first.wkt # 10k <Benchmark::Tms:0x00007fb0e02f7540 @label="", @real=21.619827999995323, @cstime=0.0, @cutime=0.0, @stime=0.8850890000000007, @utime=3.2958549999999605, @total=4.180943999999961> if a = ApplicationRecord.connection.execute( "SELECT ST_AsText( #{GeographicItem::GEOMETRY_SQL.to_sql} ) wkt from geographic_items where geographic_items.id = #{id}").first return a['wkt'] else return nil end end # @return [Float] in meters, calculated # TODO: share with world # Geographic item 96862 (Cajamar in Brazil) is the only(?) record to fail using `false` (quicker) method of everything we tested def area a = GeographicItem.where(id:).select("ST_Area(#{GeographicItem::GEOGRAPHY_SQL}, true) as area_in_meters").first['area_in_meters'] a = nil if a.nan? a end # @return [Float, false] # the value in square meters of the interesecting area of this and another GeographicItem def intersecting_area(geographic_item_id) a = GeographicItem.aliased_geographic_sql('a') b = GeographicItem.aliased_geographic_sql('b') c = GeographicItem.connection.execute( "SELECT ST_Area(ST_Intersection(#{a}, #{b})) as intersecting_area FROM geographic_items a, geographic_items b WHERE a.id = #{id} AND b.id = #{geographic_item_id};" ).first c && c['intersecting_area'].to_f end # TODO: This is bad, while internal use of ONE_WEST_MEAN is consistent it is in-accurate given the vast differences of radius vs. lat/long position. # When we strike the error-polygon from radius we should remove this # # Use case is returning the radius from a circle we calculated via buffer for error-polygon creation. def radius r = ApplicationRecord.connection.execute( "SELECT ST_MinimumBoundingRadius( ST_Transform( #{GeographicItem::GEOMETRY_SQL.to_sql}, 4326 ) ) AS radius from geographic_items where geographic_items.id = #{id}").first['radius'].split(',').last.chop.to_f r = (r * Utilities::Geo::ONE_WEST_MEAN).to_i end # Convention is to store in PostGIS in CCW # @return Array [Boolean] # false - cw # true - ccw (preferred), except cee donuts def orientations if multi_polygon.present? ApplicationRecord.connection.execute(" \ SELECT ST_IsPolygonCCW(a.geom) as is_ccw FROM ( SELECT b.id, (ST_Dump(p_geom)).geom AS geom FROM (SELECT id, multi_polygon::geometry AS p_geom FROM geographic_items where id = #{id}) AS b \ ) AS a;").collect{|a| a['is_ccw']} elsif polygon.present? ApplicationRecord.connection.execute("SELECT ST_IsPolygonCCW(polygon::geometry) as is_ccw \ FROM geographic_items where id = #{id};").collect{|a| a['is_ccw']} else [] end end # @return Boolean # looks at all orientations # if they follow the pattern [true, false, ... <all false>] then `true`, else `false` # !! Does not confirm that shapes are nested !! def is_basic_donut? a = orientations b = a.shift return false unless b a.uniq! a == [false] end def st_isvalid r = ApplicationRecord.connection.execute( "SELECT ST_IsValid( #{GeographicItem::GEOMETRY_SQL.to_sql }) from geographic_items where geographic_items.id = #{id}").first['st_isvalid'] end def st_isvalidreason r = ApplicationRecord.connection.execute( "SELECT ST_IsValidReason( #{GeographicItem::GEOMETRY_SQL.to_sql }) from geographic_items where geographic_items.id = #{id}").first['st_isvalidreason'] end # !! Unused. Doesn't check Geometry collection def has_polygons? ['GeographicItem::MultiPolygon', 'GeographicItem::Polygon'].include?(self.type) end private def align_winding if orientations.flatten.include?(false) case type when 'multi_polygon' ApplicationRecord.connection.execute( "UPDATE geographic_items set multi_polygon = ST_ForcePolygonCCW(multi_polygon::geometry) WHERE id = #{self.id};" ) when 'polygon' ApplicationRecord.connection.execute( "UPDATE geographic_items set polygon = ST_ForcePolygonCCW(polygon::geometry) WHERE id = #{self.id};" ) end end true end # Crude debuging helper, write the shapes # to a png def self.debug_draw(geographic_item_ids = []) return false if geographic_item_ids.empty? sql = "SELECT ST_AsPNG( ST_AsRaster( (SELECT ST_Union(multi_polygon::geometry) from geographic_items where id IN (" + geographic_item_ids.join(',') + ")), 1920, 1080 ) ) png;" # ST_Buffer( multi_polygon::geometry, 0, 'join=bevel'), # 1920, # 1080) result = ActiveRecord::Base.connection.execute(sql).first['png'] r = ActiveRecord::Base.connection.unescape_bytea(result) prefix = if geographic_item_ids.size > 10 'multiple' else geographic_item_ids.join('_') + '_debug.draw.png' end n = prefix + '_debug.draw.png' # Open the file in binary write mode ("wb") File.open(n, 'wb') do |file| # Write the binary data to the file file.write(r) end end # def png # if ids = Otu.joins(:cached_map_items).first.cached_map_items.pluck(:geographic_item_id) # sql = "SELECT ST_AsPNG( # ST_AsRaster( # ST_Buffer( multi_polygon::geometry, 0, 'join=bevel'), # 1024, # 768) # ) png # from geographic_items where id IN (" + ids.join(',') + ');' # # hack, not the best way to unpack result # result = ActiveRecord::Base.connection.execute(sql).first['png'] # r = ActiveRecord::Base.connection.unescape_bytea(result) # send_data r, filename: 'foo.png', type: 'imnage/png' # else # render json: {foo: false} # end # end def set_cached update_column(:cached_total_area, area) end # @return [Symbol] # returns the attribute (column name) containing data # nearly all methods should use #geo_object_type, not geo_type def geo_type DATA_TYPES.each { |item| return item if send(item) } nil end # @return [Boolean, String] false if already set, or type to which it was set def set_type_if_geography_present if type.blank? column = geo_type self.type = "GeographicItem::#{column.to_s.camelize}" if column end end # @param [RGeo::Point] point # @return [Array] of a point # Longitude |, Latitude - def point_to_a(point) data = [] data.push(point.x, point.y) data end # @param [RGeo::Point] point # @return [Hash] of a point def point_to_hash(point) {points: [point_to_a(point)]} end # @param [RGeo::MultiPoint] multi_point # @return [Array] of points def multi_point_to_a(multi_point) data = [] multi_point.each { |point| data.push([point.x, point.y]) } data end # @return [Hash] of points def multi_point_to_hash(_multi_point) # when we encounter a multi_point type, we only stick the points into the array, NOT it's identity as a group {points: multi_point_to_a(multi_point)} end # @param [Reo::LineString] line_string # @return [Array] of points in the line def line_string_to_a(line_string) data = [] line_string.points.each { |point| data.push([point.x, point.y]) } data end # @param [Reo::LineString] line_string # @return [Hash] of points in the line def line_string_to_hash(line_string) {lines: [line_string_to_a(line_string)]} end # @param [RGeo::Polygon] polygon # @return [Array] of points in the polygon (exterior_ring ONLY) def polygon_to_a(polygon) # TODO: handle other parts of the polygon; i.e., the interior_rings (if they exist) data = [] polygon.exterior_ring.points.each { |point| data.push([point.x, point.y]) } data end # @param [RGeo::Polygon] polygon # @return [Hash] of points in the polygon (exterior_ring ONLY) def polygon_to_hash(polygon) {polygons: [polygon_to_a(polygon)]} end # @return [Array] of line_strings as arrays of points # @param [RGeo::MultiLineString] multi_line_string def multi_line_string_to_a(multi_line_string) data = [] multi_line_string.each { |line_string| line_data = [] line_string.points.each { |point| line_data.push([point.x, point.y]) } data.push(line_data) } data end # @return [Hash] of line_strings as hashes of points def multi_line_string_to_hash(_multi_line_string) {lines: to_a} end # @param [RGeo::MultiPolygon] multi_polygon # @return [Array] of arrays of points in the polygons (exterior_ring ONLY) def multi_polygon_to_a(multi_polygon) data = [] multi_polygon.each { |polygon| polygon_data = [] polygon.exterior_ring.points.each { |point| polygon_data.push([point.x, point.y]) } data.push(polygon_data) } data end # @return [Hash] of hashes of points in the polygons (exterior_ring ONLY) def multi_polygon_to_hash(_multi_polygon) {polygons: to_a} end # @return [Boolean] iff there is one and only one shape column set def some_data_is_provided data = [] DATA_TYPES.each do |item| data.push(item) if send(item).present? end case data.count when 0 errors.add(:base, 'No shape provided or provided shape is invalid') when 1 return true else data.each do |object| errors.add(object, 'More than one shape type provided') end end true end end |
#multi_line_string ⇒ RGeo::Geographic::ProjectedMultiLineStringImpl
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# File 'app/models/geographic_item.rb', line 40 class GeographicItem < ApplicationRecord include Housekeeping::Users include Housekeeping::Timestamps include Shared::HasPapertrail include Shared::IsData include Shared::SharedAcrossProjects # @return [Hash, nil] # An internal variable for use in super calls, holds a Hash in GeoJSON format (temporarily) attr_accessor :geometry # @return [Boolean, RGeo object] # @params value [Hash in GeoJSON format] ?! # TODO: WHY! boolean not nil, or object # Used to build geographic items from a shape [ of what class ] !? attr_accessor :shape # @return [Boolean] # When true cached values are not built attr_accessor :no_cached DATA_TYPES = [ :point, :line_string, :polygon, :multi_point, :multi_line_string, :multi_polygon, :geometry_collection ].freeze GEOMETRY_SQL = Arel::Nodes::Case.new(arel_table[:type]) .when('GeographicItem::MultiPolygon').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:multi_polygon].as('geometry')])) .when('GeographicItem::Point').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:point].as('geometry')])) .when('GeographicItem::LineString').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:line_string].as('geometry')])) .when('GeographicItem::Polygon').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:polygon].as('geometry')])) .when('GeographicItem::MultiLineString').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:multi_line_string].as('geometry')])) .when('GeographicItem::MultiPoint').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:multi_point].as('geometry')])) .when('GeographicItem::GeometryCollection').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:geometry_collection].as('geometry')])) .freeze GEOGRAPHY_SQL = "CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN multi_polygon WHEN 'GeographicItem::Point' THEN point WHEN 'GeographicItem::LineString' THEN line_string WHEN 'GeographicItem::Polygon' THEN polygon WHEN 'GeographicItem::MultiLineString' THEN multi_line_string WHEN 'GeographicItem::MultiPoint' THEN multi_point WHEN 'GeographicItem::GeometryCollection' THEN geometry_collection END".freeze # ANTI_MERIDIAN = '0X0102000020E61000000200000000000000008066400000000000405640000000000080664000000000004056C0' ANTI_MERIDIAN = 'LINESTRING (180 89.0, 180 -89)'.freeze has_many :cached_map_items, inverse_of: :geographic_item has_many :geographic_areas_geographic_items, dependent: :destroy, inverse_of: :geographic_item has_many :geographic_areas, through: :geographic_areas_geographic_items has_many :asserted_distributions, through: :geographic_areas has_many :geographic_area_types, through: :geographic_areas has_many :parent_geographic_areas, through: :geographic_areas, source: :parent has_many :georeferences, inverse_of: :geographic_item has_many :georeferences_through_error_geographic_item, class_name: 'Georeference', foreign_key: :error_geographic_item_id, inverse_of: :error_geographic_item has_many :collecting_events_through_georeferences, through: :georeferences, source: :collecting_event has_many :collecting_events_through_georeference_error_geographic_item, through: :georeferences_through_error_geographic_item, source: :collecting_event # TODO: THIS IS NOT GOOD before_validation :set_type_if_geography_present validate :some_data_is_provided validates :type, presence: true # not needed scope :include_collecting_event, -> { includes(:collecting_events_through_georeferences) } scope :geo_with_collecting_event, -> { joins(:collecting_events_through_georeferences) } scope :err_with_collecting_event, -> { joins(:georeferences_through_error_geographic_item) } after_save :set_cached, unless: Proc.new {|n| n.no_cached || errors.any? } after_save :align_winding class << self def aliased_geographic_sql(name = 'a') "CASE #{name}.type \ WHEN 'GeographicItem::MultiPolygon' THEN #{name}.multi_polygon \ WHEN 'GeographicItem::Point' THEN #{name}.point \ WHEN 'GeographicItem::LineString' THEN #{name}.line_string \ WHEN 'GeographicItem::Polygon' THEN #{name}.polygon \ WHEN 'GeographicItem::MultiLineString' THEN #{name}.multi_line_string \ WHEN 'GeographicItem::MultiPoint' THEN #{name}.multi_point \ WHEN 'GeographicItem::GeometryCollection' THEN #{name}.geometry_collection \ END" end def st_union(geographic_item_scope) GeographicItem.select("ST_Union(#{GeographicItem::GEOMETRY_SQL.to_sql}) as collection") .where(id: geographic_item_scope.pluck(:id)) end def st_collect(geographic_item_scope) GeographicItem.select("ST_Collect(#{GeographicItem::GEOMETRY_SQL.to_sql}) as collection") .where(id: geographic_item_scope.pluck(:id)) end # @return [GeographicItem::ActiveRecord_Relation] # @params [Array] array of geographic area ids def default_by_geographic_area_ids(geographic_area_ids = []) GeographicItem. joins(:geographic_areas_geographic_items). merge(::GeographicAreasGeographicItem.default_geographic_item_data). where(geographic_areas_geographic_items: {geographic_area_id: geographic_area_ids}) end # @param [String] wkt # @return [Boolean] # whether or not the wtk intersects with the anti-meridian # !! StrongParams security considerations def crosses_anti_meridian?(wkt) GeographicItem.find_by_sql( ['SELECT ST_Intersects(ST_GeogFromText(?), ST_GeogFromText(?)) as r;', wkt, ANTI_MERIDIAN] ).first.r end # @param [Integer] ids # @return [Boolean] # whether or not any GeographicItem passed intersects the anti-meridian # !! StrongParams security considerations # This is our first line of defense against queries that define multiple shapes, one or # more of which crosses the anti-meridian. In this case the current TW strategy within the # UI is to abandon the search, and prompt the user to refactor the query. def crosses_anti_meridian_by_id?(*ids) q1 = ["SELECT ST_Intersects((SELECT single_geometry FROM (#{GeographicItem.single_geometry_sql(*ids)}) as " \ 'left_intersect), ST_GeogFromText(?)) as r;', ANTI_MERIDIAN] _q2 = ActiveRecord::Base.send(:sanitize_sql_array, ['SELECT ST_Intersects((SELECT single_geometry FROM (?) as ' \ 'left_intersect), ST_GeogFromText(?)) as r;', GeographicItem.single_geometry_sql(*ids), ANTI_MERIDIAN]) GeographicItem.find_by_sql(q1).first.r end # # SQL fragments # # @param [Integer, String] # @return [String] # a SQL select statement that returns the *geometry* for the geographic_item with the specified id def select_geometry_sql(geographic_item_id) "SELECT #{GeographicItem::GEOMETRY_SQL.to_sql} from geographic_items where geographic_items.id = #{geographic_item_id}" end # @param [Integer, String] # @return [String] # a SQL select statement that returns the geography for the geographic_item with the specified id def select_geography_sql(geographic_item_id) ActiveRecord::Base.send(:sanitize_sql_for_conditions, [ "SELECT #{GeographicItem::GEOMETRY_SQL.to_sql} from geographic_items where geographic_items.id = ?", geographic_item_id]) end # @param [Symbol] choice # @return [String] # a fragment returning either latitude or longitude columns def lat_long_sql(choice) return nil unless [:latitude, :longitude].include?(choice) f = "'D.DDDDDD'" # TODO: probably a constant somewhere v = (choice == :latitude ? 1 : 2) "CASE geographic_items.type WHEN 'GeographicItem::GeometryCollection' THEN split_part(ST_AsLatLonText(ST_Centroid" \ "(geometry_collection::geometry), #{f}), ' ', #{v}) WHEN 'GeographicItem::LineString' THEN split_part(ST_AsLatLonText(ST_Centroid(line_string::geometry), " \ "#{f}), ' ', #{v}) WHEN 'GeographicItem::MultiPolygon' THEN split_part(ST_AsLatLonText(" \ "ST_Centroid(multi_polygon::geometry), #{f}), ' ', #{v}) WHEN 'GeographicItem::Point' THEN split_part(ST_AsLatLonText(" \ "ST_Centroid(point::geometry), #{f}), ' ', #{v}) WHEN 'GeographicItem::Polygon' THEN split_part(ST_AsLatLonText(" \ "ST_Centroid(polygon::geometry), #{f}), ' ', #{v}) WHEN 'GeographicItem::MultiLineString' THEN split_part(ST_AsLatLonText(" \ "ST_Centroid(multi_line_string::geometry), #{f} ), ' ', #{v}) WHEN 'GeographicItem::MultiPoint' THEN split_part(ST_AsLatLonText(" \ "ST_Centroid(multi_point::geometry), #{f}), ' ', #{v}) END as #{choice}" end # @param [Integer] geographic_item_id # @param [Integer] distance # @return [String] def within_radius_of_item_sql(geographic_item_id, distance) "ST_DWithin((#{GeographicItem::GEOGRAPHY_SQL}), (#{select_geography_sql(geographic_item_id)}), #{distance})" end # @param [Integer] geographic_item_id # @param [Number] distance in meters to grow/shrink the shape (negative allowed) # @param [Number] distance (in meters) (positive only?!) # @return [String] def st_buffer_st_within(geographic_item_id, distance, buffer = 0) "ST_DWithin( ST_Buffer(#{GeographicItem::GEOGRAPHY_SQL}, #{buffer}), (#{select_geography_sql(geographic_item_id)}), #{distance} )" end # TODO: 3D is overkill here # @param [String] wkt # @param [Integer] distance (meters) # @return [String] # !! This is intersecting def intersecting_radius_of_wkt_sql(wkt, distance) "ST_DWithin((#{GeographicItem::GEOGRAPHY_SQL}), ST_Transform( ST_GeomFromText('#{wkt}', " \ "4326), 4326), #{distance})" end # @param [String] wkt # @param [Integer] distance (meters) # @return [String] # !! This is fully covering def within_radius_of_wkt_sql(wkt, distance) "ST_Covers( ST_Buffer(ST_SetSRID( ST_GeomFromText('#{wkt}'), 4326)::geography, #{distance}), (#{GeographicItem::GEOGRAPHY_SQL}))" end # @param [String, Integer, String] # @return [String] # a SQL fragment for ST_Contains() function, returns # all geographic items which are contained in the item supplied def containing_sql(target_column_name = nil, geographic_item_id = nil, source_column_name = nil) return 'false' if geographic_item_id.nil? || source_column_name.nil? || target_column_name.nil? "ST_Contains(#{target_column_name}::geometry, (#{geometry_sql(geographic_item_id, source_column_name)}))" end # @param [String, Integer, String] # @return [String] # a SQL fragment for ST_Contains(), returns # all geographic_items which contain the supplied geographic_item def reverse_containing_sql(target_column_name = nil, geographic_item_id = nil, source_column_name = nil) return 'false' if geographic_item_id.nil? || source_column_name.nil? || target_column_name.nil? "ST_Contains((#{geometry_sql(geographic_item_id, source_column_name)}), #{target_column_name}::geometry)" end # @param [Integer, String] # @return [String] # a SQL fragment that represents the geometry of the geographic item specified (which has data in the # source_column_name, i.e. geo_object_type) def geometry_sql(geographic_item_id = nil, source_column_name = nil) return 'false' if geographic_item_id.nil? || source_column_name.nil? "select geom_alias_tbl.#{source_column_name}::geometry from geographic_items geom_alias_tbl " \ "where geom_alias_tbl.id = #{geographic_item_id}" end # rubocop:disable Metrics/MethodLength # @param [String] column_name # @param [GeographicItem] geographic_item # @return [String] of SQL def is_contained_by_sql(column_name, geographic_item) geo_id = geographic_item.id geo_type = geographic_item.geo_object_type template = '(ST_Contains((select geographic_items.%s::geometry from geographic_items where ' \ 'geographic_items.id = %d), %s::geometry))' retval = [] column_name.downcase! case column_name when 'any' DATA_TYPES.each { |column| unless column == :geometry_collection retval.push(template % [geo_type, geo_id, column]) end } when 'any_poly', 'any_line' DATA_TYPES.each { |column| unless column == :geometry_collection if column.to_s.index(column_name.gsub('any_', '')) retval.push(template % [geo_type, geo_id, column]) end end } else retval = template % [geo_type, geo_id, column_name] end retval = retval.join(' OR ') if retval.instance_of?(Array) retval end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] # a select query that returns a single geometry (column name 'single_geometry' for the collection of ids # provided via ST_Collect) def st_collect_sql(*geographic_item_ids) geographic_item_ids.flatten! ActiveRecord::Base.send(:sanitize_sql_for_conditions, [ "SELECT ST_Collect(f.the_geom) AS single_geometry FROM ( SELECT (ST_DUMP(#{GeographicItem::GEOMETRY_SQL.to_sql})).geom as the_geom FROM geographic_items WHERE id in (?)) AS f", geographic_item_ids]) end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] # returns one or more geographic items combined as a single geometry in column 'single' def single_geometry_sql(*geographic_item_ids) a = GeographicItem.st_collect_sql(geographic_item_ids) '(SELECT single.single_geometry FROM (' + a + ' ) AS single)' end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] # returns a single geometry "column" (paren wrapped) as "single" for multiple geographic item ids, or the # geometry as 'geometry' for a single id def geometry_sql2(*geographic_item_ids) geographic_item_ids.flatten! # *ALWAYS* reduce the pile to a single level of ids if geographic_item_ids.count == 1 "(#{GeographicItem.geometry_for_sql(geographic_item_ids.first)})" else GeographicItem.single_geometry_sql(geographic_item_ids) end end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] def containing_where_sql(*geographic_item_ids) "ST_CoveredBy( #{GeographicItem.geometry_sql2(*geographic_item_ids)}, CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN multi_polygon::geometry WHEN 'GeographicItem::Point' THEN point::geometry WHEN 'GeographicItem::LineString' THEN line_string::geometry WHEN 'GeographicItem::Polygon' THEN polygon::geometry WHEN 'GeographicItem::MultiLineString' THEN multi_line_string::geometry WHEN 'GeographicItem::MultiPoint' THEN multi_point::geometry END)" end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] def containing_where_sql_geog(*geographic_item_ids) "ST_CoveredBy( #{GeographicItem.geometry_sql2(*geographic_item_ids)}, CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN multi_polygon::geography WHEN 'GeographicItem::Point' THEN point::geography WHEN 'GeographicItem::LineString' THEN line_string::geography WHEN 'GeographicItem::Polygon' THEN polygon::geography WHEN 'GeographicItem::MultiLineString' THEN multi_line_string::geography WHEN 'GeographicItem::MultiPoint' THEN multi_point::geography END)" end # @param [Interger, Array of Integer] ids # @return [Array] # If we detect that some query id has crossed the meridian, then loop through # and "manually" build up a list of results. # Should only be used if GeographicItem.crosses_anti_meridian_by_id? is true. # Note that this does not return a Scope, so you can't chain it like contained_by? # TODO: test this def contained_by_with_antimeridian_check(*ids) ids.flatten! # make sure there is only one level of splat (*) results = [] crossing_ids = [] ids.each do |id| # push each which crosses crossing_ids.push(id) if GeographicItem.crosses_anti_meridian_by_id?(id) end non_crossing_ids = ids - crossing_ids results.push GeographicItem.contained_by(non_crossing_ids).to_a if non_crossing_ids.any? crossing_ids.each do |id| # [61666, 61661, 61659, 61654, 61639] q1 = ActiveRecord::Base.send(:sanitize_sql_array, ['SELECT ST_AsText((SELECT polygon FROM geographic_items ' \ 'WHERE id = ?))', id]) r = GeographicItem.where( # GeographicItem.contained_by_wkt_shifted_sql(GeographicItem.find(id).geo_object.to_s) GeographicItem.contained_by_wkt_shifted_sql( ApplicationRecord.connection.execute(q1).first['st_astext']) ).to_a results.push(r) end results.flatten.uniq end # @params [String] well known text # @return [String] the SQL fragment for the specific geometry type, shifted by longitude # Note: this routine is called when it is already known that the A argument crosses anti-meridian def contained_by_wkt_shifted_sql(wkt) "ST_Contains(ST_ShiftLongitude(ST_GeomFromText('#{wkt}', 4326)), ( CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN ST_ShiftLongitude(multi_polygon::geometry) WHEN 'GeographicItem::Point' THEN ST_ShiftLongitude(point::geometry) WHEN 'GeographicItem::LineString' THEN ST_ShiftLongitude(line_string::geometry) WHEN 'GeographicItem::Polygon' THEN ST_ShiftLongitude(polygon::geometry) WHEN 'GeographicItem::MultiLineString' THEN ST_ShiftLongitude(multi_line_string::geometry) WHEN 'GeographicItem::MultiPoint' THEN ST_ShiftLongitude(multi_point::geometry) END ) )" end # TODO: Remove the hard coded 4326 reference # @params [String] wkt # @return [String] SQL fragment limiting geographics items to those in this WKT def contained_by_wkt_sql(wkt) if crosses_anti_meridian?(wkt) retval = contained_by_wkt_shifted_sql(wkt) else retval = "ST_Contains(ST_GeomFromText('#{wkt}', 4326), ( CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN multi_polygon::geometry WHEN 'GeographicItem::Point' THEN point::geometry WHEN 'GeographicItem::LineString' THEN line_string::geometry WHEN 'GeographicItem::Polygon' THEN polygon::geometry WHEN 'GeographicItem::MultiLineString' THEN multi_line_string::geometry WHEN 'GeographicItem::MultiPoint' THEN multi_point::geometry END ) )" end retval end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] sql for contained_by via ST_ContainsProperly # Note: Can not use GEOMETRY_SQL because geometry_collection is not supported in ST_ContainsProperly # Note: !! If the target GeographicItem#id crosses the anti-meridian then you may/will get unexpected results. def contained_by_where_sql(*geographic_item_ids) "ST_Contains( #{GeographicItem.geometry_sql2(*geographic_item_ids)}, CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN multi_polygon::geometry WHEN 'GeographicItem::Point' THEN point::geometry WHEN 'GeographicItem::LineString' THEN line_string::geometry WHEN 'GeographicItem::Polygon' THEN polygon::geometry WHEN 'GeographicItem::MultiLineString' THEN multi_line_string::geometry WHEN 'GeographicItem::MultiPoint' THEN multi_point::geometry END)" end # @param [RGeo:Point] rgeo_point # @return [String] sql for containing via ST_CoveredBy # TODO: Remove the hard coded 4326 reference # TODO: should this be wkt_point instead of rgeo_point? def containing_where_for_point_sql(rgeo_point) "ST_CoveredBy( ST_GeomFromText('#{rgeo_point}', 4326), #{GeographicItem::GEOMETRY_SQL.to_sql} )" end # @param [Interger] geographic_item_id # @return [String] SQL for geometries # example, not used def geometry_for_sql(geographic_item_id) 'SELECT ' + GeographicItem::GEOMETRY_SQL.to_sql + ' AS geometry FROM geographic_items WHERE id = ' \ "#{geographic_item_id} LIMIT 1" end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] SQL for geometries # example, not used def geometry_for_collection_sql(*geographic_item_ids) 'SELECT ' + GeographicItem::GEOMETRY_SQL.to_sql + ' AS geometry FROM geographic_items WHERE id IN ' \ "( #{geographic_item_ids.join(',')} )" end # # Scopes # # @param [Interger, Array of Integer] geographic_item_ids # @return [Scope] # the geographic items containing these collective geographic_item ids, not including self def containing(*geographic_item_ids) where(GeographicItem.containing_where_sql(geographic_item_ids)).not_ids(*geographic_item_ids) end # @param [Interger, Array of Integer] geographic_item_ids # @return [Scope] # the geographic items contained by any of these geographic_item ids, not including self # (works via ST_ContainsProperly) def contained_by(*geographic_item_ids) where(GeographicItem.contained_by_where_sql(geographic_item_ids)) end # @param [RGeo::Point] rgeo_point # @return [Scope] # the geographic items containing this point # TODO: should be containing_wkt ? def containing_point(rgeo_point) where(GeographicItem.containing_where_for_point_sql(rgeo_point)) end # @return [Scope] # adds an area_in_meters field, with meters def with_area select("ST_Area(#{GeographicItem::GEOGRAPHY_SQL}, false) as area_in_meters") end # return [Scope] # A scope that limits the result to those GeographicItems that have a collecting event # through either the geographic_item or the error_geographic_item # # A raw SQL join approach for comparison # # GeographicItem.joins('LEFT JOIN georeferences g1 ON geographic_items.id = g1.geographic_item_id'). # joins('LEFT JOIN georeferences g2 ON geographic_items.id = g2.error_geographic_item_id'). # where("(g1.geographic_item_id IS NOT NULL OR g2.error_geographic_item_id IS NOT NULL)").uniq # @return [Scope] GeographicItem # This uses an Arel table approach, this is ultimately more decomposable if we need. Of use: # http://danshultz.github.io/talks/mastering_activerecord_arel <- best # https://github.com/rails/arel # http://stackoverflow.com/questions/4500629/use-arel-for-a-nested-set-join-query-and-convert-to-activerecordrelation # http://rdoc.info/github/rails/arel/Arel/SelectManager # http://stackoverflow.com/questions/7976358/activerecord-arel-or-condition # def with_collecting_event_through_georeferences geographic_items = GeographicItem.arel_table georeferences = Georeference.arel_table g1 = georeferences.alias('a') g2 = georeferences.alias('b') c = geographic_items.join(g1, Arel::Nodes::OuterJoin).on(geographic_items[:id].eq(g1[:geographic_item_id])) .join(g2, Arel::Nodes::OuterJoin).on(geographic_items[:id].eq(g2[:error_geographic_item_id])) GeographicItem.joins(# turn the Arel back into scope c.join_sources # translate the Arel join to a join hash(?) ).where( g1[:id].not_eq(nil).or(g2[:id].not_eq(nil)) # returns a Arel::Nodes::Grouping ).distinct end # @return [Scope] include a 'latitude' column def with_latitude select(lat_long_sql(:latitude)) end # @return [Scope] include a 'longitude' column def with_longitude select(lat_long_sql(:longitude)) end # @param [String, GeographicItems] # @return [Scope] def intersecting(column_name, *geographic_items) if column_name.downcase == 'any' pieces = [] DATA_TYPES.each { |column| pieces.push(GeographicItem.intersecting(column.to_s, geographic_items).to_a) } # @TODO change 'id in (?)' to some other sql construct GeographicItem.where(id: pieces.flatten.map(&:id)) else q = geographic_items.flatten.collect { |geographic_item| "ST_Intersects(#{column_name}, '#{geographic_item.geo_object}' )" # seems like we want this: http://danshultz.github.io/talks/mastering_activerecord_arel/#/15/2 }.join(' or ') where(q) end end # @param [GeographicItem#id] geographic_item_id # @param [Float] distance in meters ?!?! # @return [ActiveRecord::Relation] # !! should be distance, not radius?! def within_radius_of_item(geographic_item_id, distance) where(within_radius_of_item_sql(geographic_item_id, distance)) end # @param [String, GeographicItem] # @return [Scope] # a SQL fragment for ST_DISJOINT, specifies all geographic_items that have data in column_name # that are disjoint from the passed geographic_items def disjoint_from(column_name, *geographic_items) q = geographic_items.flatten.collect { |geographic_item| "ST_DISJOINT(#{column_name}::geometry, (#{geometry_sql(geographic_item.to_param, geographic_item.geo_object_type)}))" }.join(' and ') where(q) end # @return [Scope] # see are_contained_in_item_by_id # @param [String] column_name # @param [GeographicItem, Array] geographic_items def are_contained_in_item(column_name, *geographic_items) are_contained_in_item_by_id(column_name, geographic_items.flatten.map(&:id)) end # rubocop:disable Metrics/MethodLength # @param [String] column_name to search # @param [GeographicItem] geographic_item_ids or array of geographic_item_ids to be tested. # @return [Scope] of GeographicItems # # If this scope is given an Array of GeographicItems as a second parameter, # it will return the 'OR' of each of the objects against the table. # SELECT COUNT(*) FROM "geographic_items" # WHERE (ST_Contains(polygon::geometry, GeomFromEWKT('srid=4326;POINT (0.0 0.0 0.0)')) # OR ST_Contains(polygon::geometry, GeomFromEWKT('srid=4326;POINT (-9.8 5.0 0.0)'))) # def are_contained_in_item_by_id(column_name, *geographic_item_ids) # = containing geographic_item_ids.flatten! # in case there is a array of arrays, or multiple objects column_name.downcase! case column_name when 'any' part = [] DATA_TYPES.each { |column| unless column == :geometry_collection part.push(GeographicItem.are_contained_in_item_by_id(column.to_s, geographic_item_ids).to_a) end } # TODO: change 'id in (?)' to some other sql construct GeographicItem.where(id: part.flatten.map(&:id)) when 'any_poly', 'any_line' part = [] DATA_TYPES.each { |column| if column.to_s.index(column_name.gsub('any_', '')) part.push(GeographicItem.are_contained_in_item_by_id("#{column}", geographic_item_ids).to_a) end } # TODO: change 'id in (?)' to some other sql construct GeographicItem.where(id: part.flatten.map(&:id)) else q = geographic_item_ids.flatten.collect { |geographic_item_id| # discover the item types, and convert type to database type for 'multi_' b = GeographicItem.where(id: geographic_item_id) .pluck(:type)[0].split(':')[2].downcase.gsub('lti', 'lti_') # a = GeographicItem.find(geographic_item_id).geo_object_type GeographicItem.containing_sql(column_name, geographic_item_id, b) }.join(' or ') q = 'FALSE' if q.blank? # this will prevent the invocation of *ALL* of the GeographicItems, if there are # no GeographicItems in the request (see CollectingEvent.name_hash(types)). where(q) # .not_including(geographic_items) end end # rubocop:enable Metrics/MethodLength # @param [String] column_name # @param [String] geometry of WKT # @return [Scope] # a single WKT geometry is compared against column or columns (except geometry_collection) to find geographic_items # which are contained in the WKT def are_contained_in_wkt(column_name, geometry) column_name.downcase! # column_name = 'point' case column_name when 'any' part = [] DATA_TYPES.each { |column| unless column == :geometry_collection part.push(GeographicItem.are_contained_in_wkt(column.to_s, geometry).pluck(:id).to_a) end } # TODO: change 'id in (?)' to some other sql construct GeographicItem.where(id: part.flatten) when 'any_poly', 'any_line' part = [] DATA_TYPES.each { |column| if column.to_s.index(column_name.gsub('any_', '')) part.push(GeographicItem.are_contained_in_wkt("#{column}", geometry).pluck(:id).to_a) end } # TODO: change 'id in (?)' to some other sql construct GeographicItem.where(id: part.flatten) else # column = points, geometry = square q = "ST_Contains(ST_GeomFromEWKT('srid=4326;#{geometry}'), #{column_name}::geometry)" where(q) # .not_including(geographic_items) end end # rubocop:disable Metrics/MethodLength # containing the items the shape of which is contained in the geographic_item[s] supplied. # @param column_name [String] can be any of DATA_TYPES, or 'any' to check against all types, 'any_poly' to check # against 'polygon' or 'multi_polygon', or 'any_line' to check against 'line_string' or 'multi_line_string'. # CANNOT be 'geometry_collection'. # @param geographic_items [GeographicItem] Can be a single GeographicItem, or an array of GeographicItem. # @return [Scope] def is_contained_by(column_name, *geographic_items) column_name.downcase! case column_name when 'any' part = [] DATA_TYPES.each { |column| unless column == :geometry_collection part.push(GeographicItem.is_contained_by(column.to_s, geographic_items).to_a) end } # @TODO change 'id in (?)' to some other sql construct GeographicItem.where(id: part.flatten.map(&:id)) when 'any_poly', 'any_line' part = [] DATA_TYPES.each { |column| unless column == :geometry_collection if column.to_s.index(column_name.gsub('any_', '')) part.push(GeographicItem.is_contained_by(column.to_s, geographic_items).to_a) end end } # @TODO change 'id in (?)' to some other sql construct GeographicItem.where(id: part.flatten.map(&:id)) else q = geographic_items.flatten.collect { |geographic_item| GeographicItem.reverse_containing_sql(column_name, geographic_item.to_param, geographic_item.geo_object_type) }.join(' or ') where(q) # .not_including(geographic_items) end end # rubocop:enable Metrics/MethodLength # @param [String, GeographicItem] # @return [Scope] def ordered_by_shortest_distance_from(column_name, geographic_item) if true # check_geo_params(column_name, geographic_item) select_distance_with_geo_object(column_name, geographic_item) .where_distance_greater_than_zero(column_name, geographic_item).order('distance') else where('false') end end # @param [String, GeographicItem] # @return [Scope] def ordered_by_longest_distance_from(column_name, geographic_item) if true # check_geo_params(column_name, geographic_item) q = select_distance_with_geo_object(column_name, geographic_item) .where_distance_greater_than_zero(column_name, geographic_item) .order('distance desc') q else where('false') end end # @param [String] column_name # @param [GeographicItem] geographic_item # @return [String] def select_distance_with_geo_object(column_name, geographic_item) select("*, ST_Distance(#{column_name}, GeomFromEWKT('srid=4326;#{geographic_item.geo_object}')) as distance") end # @param [String, GeographicItem] # @return [Scope] def where_distance_greater_than_zero(column_name, geographic_item) where("#{column_name} is not null and ST_Distance(#{column_name}, " \ "GeomFromEWKT('srid=4326;#{geographic_item.geo_object}')) > 0") end # @param [GeographicItem] # @return [Scope] def not_including(geographic_items) where.not(id: geographic_items) end # @return [Scope] # includes an 'is_valid' attribute (True/False) for the passed geographic_item. Uses St_IsValid. # @param [RGeo object] geographic_item def with_is_valid_geometry_column(geographic_item) where(id: geographic_item.id).select("ST_IsValid(ST_AsBinary(#{geographic_item.geo_object_type})) is_valid") end # # Other # # @param [Integer] geographic_item_id1 # @param [Integer] geographic_item_id2 # @return [Float] def distance_between(geographic_item_id1, geographic_item_id2) q1 = "ST_Distance(#{GeographicItem::GEOGRAPHY_SQL}, " \ "(#{select_geography_sql(geographic_item_id2)})) as distance" _q2 = ActiveRecord::Base.send( :sanitize_sql_array, ['ST_Distance(?, (?)) as distance', GeographicItem::GEOGRAPHY_SQL, select_geography_sql(geographic_item_id2)]) GeographicItem.where(id: geographic_item_id1).pluck(Arel.sql(q1)).first end # @param [RGeo::Point] point # @return [Hash] # as per #inferred_geographic_name_hierarchy but for Rgeo point def point_inferred_geographic_name_hierarchy(point) GeographicItem.containing_point(point).order(cached_total_area: :ASC).limit(1).first&.inferred_geographic_name_hierarchy end # @param [String] type_name ('polygon', 'point', 'line' [, 'circle']) # @return [String] if type def eval_for_type(type_name) retval = 'GeographicItem' case type_name.upcase when 'POLYGON' retval += '::Polygon' when 'LINESTRING' retval += '::LineString' when 'POINT' retval += '::Point' when 'MULTIPOLYGON' retval += '::MultiPolygon' when 'MULTILINESTRING' retval += '::MultiLineString' when 'MULTIPOINT' retval += '::MultiPoint' else retval = nil end retval end # example, not used # @param [Integer] geographic_item_id # @return [RGeo::Geographic object] def geometry_for(geographic_item_id) GeographicItem.select(GeographicItem::GEOMETRY_SQL.to_sql + ' AS geometry').find(geographic_item_id)['geometry'] end # example, not used # @param [Integer, Array] geographic_item_ids # @return [Scope] def st_multi(*geographic_item_ids) GeographicItem.find_by_sql( "SELECT ST_Multi(ST_Collect(g.the_geom)) AS singlegeom FROM ( SELECT (ST_DUMP(#{GeographicItem::GEOMETRY_SQL.to_sql})).geom AS the_geom FROM geographic_items WHERE id IN (?)) AS g;", geographic_item_ids.flatten ) end end # class << self # @return [Hash] # a geographic_name_classification or empty Hash # This is a quick approach that works only when # the geographic_item is linked explicitly to a GeographicArea. # # !! Note that it is not impossible for a GeographicItem to be linked # to > 1 GeographicArea, in that case we are assuming that all are # equally refined, this might not be the case in the future because # of how the GeographicArea gazetteer is indexed. def quick_geographic_name_hierarchy geographic_areas.order(:id).each do |ga| h = ga.geographic_name_classification # not quick enough !! return h if h.present? end return {} end # @return [Hash] # a geographic_name_classification (see GeographicArea) inferred by # finding the smallest area containing this GeographicItem, in the most accurate gazetteer # and using it to return country/state/county. See also the logic in # filling in missing levels in GeographicArea. def inferred_geographic_name_hierarchy if small_area = containing_geographic_areas .joins(:geographic_areas_geographic_items) .merge(GeographicAreasGeographicItem.ordered_by_data_origin) .ordered_by_area .limit(1) .first return small_area.geographic_name_classification else {} end end def geographic_name_hierarchy a = quick_geographic_name_hierarchy # quick; almost never the case, UI not setup to do this return a if a.present? inferred_geographic_name_hierarchy # slow end # @return [Scope] # the Geographic Areas that contain (gis) this geographic item def containing_geographic_areas GeographicArea.joins(:geographic_items).includes(:geographic_area_type) .joins("JOIN (#{GeographicItem.containing(id).to_sql}) j on geographic_items.id = j.id") end # @return [Boolean] # whether stored shape is ST_IsValid def valid_geometry? GeographicItem.with_is_valid_geometry_column(self).first['is_valid'] end # @return [Array of latitude, longitude] # the lat, lon of the first point in the GeoItem, see subclass for #st_start_point def start_point o = st_start_point [o.y, o.x] end # @return [Array] # the lat, long, as STRINGs for the centroid of this geographic item # Meh- this: https://postgis.net/docs/en/ST_MinimumBoundingRadius.html def center_coords r = GeographicItem.find_by_sql( "Select split_part(ST_AsLatLonText(ST_Centroid(#{GeographicItem::GEOMETRY_SQL.to_sql}), " \ "'D.DDDDDD'), ' ', 1) latitude, split_part(ST_AsLatLonText(ST_Centroid" \ "(#{GeographicItem::GEOMETRY_SQL.to_sql}), 'D.DDDDDD'), ' ', 2) " \ "longitude from geographic_items where id = #{id};")[0] [r.latitude, r.longitude] end # @return [RGeo::Geographic::ProjectedPointImpl] # representing the centroid of this geographic item def centroid # Gis::FACTORY.point(*center_coords.reverse) return geo_object if type == 'GeographicItem::Point' return Gis::FACTORY.parse_wkt(self.st_centroid) end # @param [Integer] geographic_item_id # @return [Double] distance in meters (slower, more accurate) def st_distance(geographic_item_id) # geo_object q1 = "ST_Distance((#{GeographicItem.select_geography_sql(id)}), " \ "(#{GeographicItem.select_geography_sql(geographic_item_id)})) as d" _q2 = ActiveRecord::Base.send(:sanitize_sql_array, ['ST_Distance((?),(?)) as d', GeographicItem.select_geography_sql(self.id), GeographicItem.select_geography_sql(geographic_item_id)]) deg = GeographicItem.where(id:).pluck(Arel.sql(q1)).first deg * Utilities::Geo::ONE_WEST end # @param [GeographicItem] geographic_item # @return [Double] distance in meters # Like st_distance but works with changed and non persisted objects def st_distance_to_geographic_item(geographic_item) unless !persisted? || changed? a = "(#{GeographicItem.select_geography_sql(id)})" else a = "ST_GeographyFromText('#{geo_object}')" end unless !geographic_item.persisted? || geographic_item.changed? b = "(#{GeographicItem.select_geography_sql(geographic_item.id)})" else b = "ST_GeographyFromText('#{geographic_item.geo_object}')" end ActiveRecord::Base.connection.select_value("SELECT ST_Distance(#{a}, #{b})") end alias_method :distance_to, :st_distance # @param [Integer] geographic_item_id # @return [Double] distance in meters (faster, less accurate) def st_distance_spheroid(geographic_item_id) q1 = "ST_DistanceSpheroid((#{GeographicItem.select_geometry_sql(id)})," \ "(#{GeographicItem.select_geometry_sql(geographic_item_id)}),'#{Gis::SPHEROID}') as distance" _q2 = ActiveRecord::Base.send(:sanitize_sql_array, ['ST_DistanceSpheroid((?),(?),?) as distance', GeographicItem.select_geometry_sql(id), GeographicItem.select_geometry_sql(geographic_item_id), Gis::SPHEROID]) # TODO: what is _q2? GeographicItem.where(id:).pluck(Arel.sql(q1)).first end # @return [String] # a WKT POINT representing the centroid of the geographic item def st_centroid GeographicItem.where(id: to_param).pluck(Arel.sql("ST_AsEWKT(ST_Centroid(#{GeographicItem::GEOMETRY_SQL.to_sql}))")).first.gsub(/SRID=\d*;/, '') end # @return [Integer] # the number of points in the geometry def st_npoints GeographicItem.where(id:).pluck(Arel.sql("ST_NPoints(#{GeographicItem::GEOMETRY_SQL.to_sql}) as npoints")).first end # @return [Symbol] # the geo type (i.e. column like :point, :multipolygon). References the first-found object, # according to the list of DATA_TYPES, or nil def geo_object_type if self.class.name == 'GeographicItem' # a proxy check for new records geo_type else self.class::SHAPE_COLUMN end end # !!TODO: migrate these to use native column calls # @return [RGeo instance, nil] # the Rgeo shape (See http://rubydoc.info/github/dazuma/rgeo/RGeo/Feature) def geo_object begin if r = geo_object_type # rubocop:disable Lint/AssignmentInCondition send(r) else false end rescue RGeo::Error::InvalidGeometry return nil # TODO: we need to render proper error for this! end end # @param [geo_object] # @return [Boolean] def contains?(target_geo_object) return nil if target_geo_object.nil? self.geo_object.contains?(target_geo_object) end # @param [geo_object] # @return [Boolean] def within?(target_geo_object) self.geo_object.within?(target_geo_object) end # @param [geo_object] # @return [Boolean] def intersects?(target_geo_object) self.geo_object.intersects?(target_geo_object) end # @param [geo_object, Double] # @return [Boolean] def near(target_geo_object, distance) self.geo_object.unsafe_buffer(distance).contains?(target_geo_object) end # @param [geo_object, Double] # @return [Boolean] def far(target_geo_object, distance) !near(target_geo_object, distance) end # @return [GeoJSON hash] # via Rgeo apparently necessary for GeometryCollection def rgeo_to_geo_json RGeo::GeoJSON.encode(geo_object).to_json end # @return [Hash] # in GeoJSON format # Computed via "raw" PostGIS (much faster). This # requires the geo_object_type and id. # def to_geo_json JSON.parse( GeographicItem.connection.select_one( "SELECT ST_AsGeoJSON(#{geo_object_type}::geometry) a " \ "FROM geographic_items WHERE id=#{id};")['a']) end # We don't need to serialize to/from JSON def to_geo_json_string GeographicItem.connection.select_one( "SELECT ST_AsGeoJSON(#{geo_object_type}::geometry) a " \ "FROM geographic_items WHERE id=#{id};")['a'] end # @return [Hash] # the shape as a GeoJSON Feature with some item metadata def to_geo_json_feature @geometry ||= to_geo_json {'type' => 'Feature', 'geometry' => geometry, 'properties' => { 'geographic_item' => { 'id' => id} } } end # @param value [String] like: # '{"type":"Feature","geometry":{"type":"Point","coordinates":[2.5,4.0]},"properties":{"color":"red"}}' # # '{"type":"Feature","geometry":{"type":"Polygon","coordinates":"[[[-125.29394388198853, 48.584480409793], # [-67.11035013198853, 45.09937589848195],[-80.64550638198853, 25.01924647619111],[-117.55956888198853, # 32.5591595028449],[-125.29394388198853, 48.584480409793]]]"},"properties":{}}' # # '{"type":"Point","coordinates":[2.5,4.0]},"properties":{"color":"red"}}' # # @return [Boolean, RGeo object] def shape=(value) if value.present? begin geom = RGeo::GeoJSON.decode(value, json_parser: :json, geo_factory: Gis::FACTORY) rescue RGeo::Error::InvalidGeometry => e errors.add(:base, "invalid geometry: #{e.to_s}") return end this_type = nil if geom.respond_to?(:geometry_type) this_type = geom.geometry_type.to_s elsif geom.respond_to?(:geometry) this_type = geom.geometry.geometry_type.to_s else end self.type = GeographicItem.eval_for_type(this_type) unless geom.nil? if type.blank? errors.add(:base, 'type is not set from shape') return end object = nil s = geom.respond_to?(:geometry) ? geom.geometry.to_s : geom.to_s begin object = Gis::FACTORY.parse_wkt(s) rescue RGeo::Error::InvalidGeometry errors.add(:self, 'Shape value is an Invalid Geometry') end write_attribute(this_type.underscore.to_sym, object) geom end end # @return [String] def to_wkt # 10k #<Benchmark::Tms:0x00007fb0dfd30fd0 @label="", @real=25.237487000005785, @cstime=0.0, @cutime=0.0, @stime=1.1704609999999995, @utime=5.507929999999988, @total=6.678390999999987> # GeographicItem.select("ST_AsText( #{GeographicItem::GEOMETRY_SQL.to_sql}) wkt").where(id: id).first.wkt # 10k <Benchmark::Tms:0x00007fb0e02f7540 @label="", @real=21.619827999995323, @cstime=0.0, @cutime=0.0, @stime=0.8850890000000007, @utime=3.2958549999999605, @total=4.180943999999961> if a = ApplicationRecord.connection.execute( "SELECT ST_AsText( #{GeographicItem::GEOMETRY_SQL.to_sql} ) wkt from geographic_items where geographic_items.id = #{id}").first return a['wkt'] else return nil end end # @return [Float] in meters, calculated # TODO: share with world # Geographic item 96862 (Cajamar in Brazil) is the only(?) record to fail using `false` (quicker) method of everything we tested def area a = GeographicItem.where(id:).select("ST_Area(#{GeographicItem::GEOGRAPHY_SQL}, true) as area_in_meters").first['area_in_meters'] a = nil if a.nan? a end # @return [Float, false] # the value in square meters of the interesecting area of this and another GeographicItem def intersecting_area(geographic_item_id) a = GeographicItem.aliased_geographic_sql('a') b = GeographicItem.aliased_geographic_sql('b') c = GeographicItem.connection.execute( "SELECT ST_Area(ST_Intersection(#{a}, #{b})) as intersecting_area FROM geographic_items a, geographic_items b WHERE a.id = #{id} AND b.id = #{geographic_item_id};" ).first c && c['intersecting_area'].to_f end # TODO: This is bad, while internal use of ONE_WEST_MEAN is consistent it is in-accurate given the vast differences of radius vs. lat/long position. # When we strike the error-polygon from radius we should remove this # # Use case is returning the radius from a circle we calculated via buffer for error-polygon creation. def radius r = ApplicationRecord.connection.execute( "SELECT ST_MinimumBoundingRadius( ST_Transform( #{GeographicItem::GEOMETRY_SQL.to_sql}, 4326 ) ) AS radius from geographic_items where geographic_items.id = #{id}").first['radius'].split(',').last.chop.to_f r = (r * Utilities::Geo::ONE_WEST_MEAN).to_i end # Convention is to store in PostGIS in CCW # @return Array [Boolean] # false - cw # true - ccw (preferred), except cee donuts def orientations if multi_polygon.present? ApplicationRecord.connection.execute(" \ SELECT ST_IsPolygonCCW(a.geom) as is_ccw FROM ( SELECT b.id, (ST_Dump(p_geom)).geom AS geom FROM (SELECT id, multi_polygon::geometry AS p_geom FROM geographic_items where id = #{id}) AS b \ ) AS a;").collect{|a| a['is_ccw']} elsif polygon.present? ApplicationRecord.connection.execute("SELECT ST_IsPolygonCCW(polygon::geometry) as is_ccw \ FROM geographic_items where id = #{id};").collect{|a| a['is_ccw']} else [] end end # @return Boolean # looks at all orientations # if they follow the pattern [true, false, ... <all false>] then `true`, else `false` # !! Does not confirm that shapes are nested !! def is_basic_donut? a = orientations b = a.shift return false unless b a.uniq! a == [false] end def st_isvalid r = ApplicationRecord.connection.execute( "SELECT ST_IsValid( #{GeographicItem::GEOMETRY_SQL.to_sql }) from geographic_items where geographic_items.id = #{id}").first['st_isvalid'] end def st_isvalidreason r = ApplicationRecord.connection.execute( "SELECT ST_IsValidReason( #{GeographicItem::GEOMETRY_SQL.to_sql }) from geographic_items where geographic_items.id = #{id}").first['st_isvalidreason'] end # !! Unused. Doesn't check Geometry collection def has_polygons? ['GeographicItem::MultiPolygon', 'GeographicItem::Polygon'].include?(self.type) end private def align_winding if orientations.flatten.include?(false) case type when 'multi_polygon' ApplicationRecord.connection.execute( "UPDATE geographic_items set multi_polygon = ST_ForcePolygonCCW(multi_polygon::geometry) WHERE id = #{self.id};" ) when 'polygon' ApplicationRecord.connection.execute( "UPDATE geographic_items set polygon = ST_ForcePolygonCCW(polygon::geometry) WHERE id = #{self.id};" ) end end true end # Crude debuging helper, write the shapes # to a png def self.debug_draw(geographic_item_ids = []) return false if geographic_item_ids.empty? sql = "SELECT ST_AsPNG( ST_AsRaster( (SELECT ST_Union(multi_polygon::geometry) from geographic_items where id IN (" + geographic_item_ids.join(',') + ")), 1920, 1080 ) ) png;" # ST_Buffer( multi_polygon::geometry, 0, 'join=bevel'), # 1920, # 1080) result = ActiveRecord::Base.connection.execute(sql).first['png'] r = ActiveRecord::Base.connection.unescape_bytea(result) prefix = if geographic_item_ids.size > 10 'multiple' else geographic_item_ids.join('_') + '_debug.draw.png' end n = prefix + '_debug.draw.png' # Open the file in binary write mode ("wb") File.open(n, 'wb') do |file| # Write the binary data to the file file.write(r) end end # def png # if ids = Otu.joins(:cached_map_items).first.cached_map_items.pluck(:geographic_item_id) # sql = "SELECT ST_AsPNG( # ST_AsRaster( # ST_Buffer( multi_polygon::geometry, 0, 'join=bevel'), # 1024, # 768) # ) png # from geographic_items where id IN (" + ids.join(',') + ');' # # hack, not the best way to unpack result # result = ActiveRecord::Base.connection.execute(sql).first['png'] # r = ActiveRecord::Base.connection.unescape_bytea(result) # send_data r, filename: 'foo.png', type: 'imnage/png' # else # render json: {foo: false} # end # end def set_cached update_column(:cached_total_area, area) end # @return [Symbol] # returns the attribute (column name) containing data # nearly all methods should use #geo_object_type, not geo_type def geo_type DATA_TYPES.each { |item| return item if send(item) } nil end # @return [Boolean, String] false if already set, or type to which it was set def set_type_if_geography_present if type.blank? column = geo_type self.type = "GeographicItem::#{column.to_s.camelize}" if column end end # @param [RGeo::Point] point # @return [Array] of a point # Longitude |, Latitude - def point_to_a(point) data = [] data.push(point.x, point.y) data end # @param [RGeo::Point] point # @return [Hash] of a point def point_to_hash(point) {points: [point_to_a(point)]} end # @param [RGeo::MultiPoint] multi_point # @return [Array] of points def multi_point_to_a(multi_point) data = [] multi_point.each { |point| data.push([point.x, point.y]) } data end # @return [Hash] of points def multi_point_to_hash(_multi_point) # when we encounter a multi_point type, we only stick the points into the array, NOT it's identity as a group {points: multi_point_to_a(multi_point)} end # @param [Reo::LineString] line_string # @return [Array] of points in the line def line_string_to_a(line_string) data = [] line_string.points.each { |point| data.push([point.x, point.y]) } data end # @param [Reo::LineString] line_string # @return [Hash] of points in the line def line_string_to_hash(line_string) {lines: [line_string_to_a(line_string)]} end # @param [RGeo::Polygon] polygon # @return [Array] of points in the polygon (exterior_ring ONLY) def polygon_to_a(polygon) # TODO: handle other parts of the polygon; i.e., the interior_rings (if they exist) data = [] polygon.exterior_ring.points.each { |point| data.push([point.x, point.y]) } data end # @param [RGeo::Polygon] polygon # @return [Hash] of points in the polygon (exterior_ring ONLY) def polygon_to_hash(polygon) {polygons: [polygon_to_a(polygon)]} end # @return [Array] of line_strings as arrays of points # @param [RGeo::MultiLineString] multi_line_string def multi_line_string_to_a(multi_line_string) data = [] multi_line_string.each { |line_string| line_data = [] line_string.points.each { |point| line_data.push([point.x, point.y]) } data.push(line_data) } data end # @return [Hash] of line_strings as hashes of points def multi_line_string_to_hash(_multi_line_string) {lines: to_a} end # @param [RGeo::MultiPolygon] multi_polygon # @return [Array] of arrays of points in the polygons (exterior_ring ONLY) def multi_polygon_to_a(multi_polygon) data = [] multi_polygon.each { |polygon| polygon_data = [] polygon.exterior_ring.points.each { |point| polygon_data.push([point.x, point.y]) } data.push(polygon_data) } data end # @return [Hash] of hashes of points in the polygons (exterior_ring ONLY) def multi_polygon_to_hash(_multi_polygon) {polygons: to_a} end # @return [Boolean] iff there is one and only one shape column set def some_data_is_provided data = [] DATA_TYPES.each do |item| data.push(item) if send(item).present? end case data.count when 0 errors.add(:base, 'No shape provided or provided shape is invalid') when 1 return true else data.each do |object| errors.add(object, 'More than one shape type provided') end end true end end |
#multi_point ⇒ RGeo::Geographic::ProjectedMultiPointImpl
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# File 'app/models/geographic_item.rb', line 40 class GeographicItem < ApplicationRecord include Housekeeping::Users include Housekeeping::Timestamps include Shared::HasPapertrail include Shared::IsData include Shared::SharedAcrossProjects # @return [Hash, nil] # An internal variable for use in super calls, holds a Hash in GeoJSON format (temporarily) attr_accessor :geometry # @return [Boolean, RGeo object] # @params value [Hash in GeoJSON format] ?! # TODO: WHY! boolean not nil, or object # Used to build geographic items from a shape [ of what class ] !? attr_accessor :shape # @return [Boolean] # When true cached values are not built attr_accessor :no_cached DATA_TYPES = [ :point, :line_string, :polygon, :multi_point, :multi_line_string, :multi_polygon, :geometry_collection ].freeze GEOMETRY_SQL = Arel::Nodes::Case.new(arel_table[:type]) .when('GeographicItem::MultiPolygon').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:multi_polygon].as('geometry')])) .when('GeographicItem::Point').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:point].as('geometry')])) .when('GeographicItem::LineString').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:line_string].as('geometry')])) .when('GeographicItem::Polygon').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:polygon].as('geometry')])) .when('GeographicItem::MultiLineString').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:multi_line_string].as('geometry')])) .when('GeographicItem::MultiPoint').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:multi_point].as('geometry')])) .when('GeographicItem::GeometryCollection').then(Arel::Nodes::NamedFunction.new('CAST', [arel_table[:geometry_collection].as('geometry')])) .freeze GEOGRAPHY_SQL = "CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN multi_polygon WHEN 'GeographicItem::Point' THEN point WHEN 'GeographicItem::LineString' THEN line_string WHEN 'GeographicItem::Polygon' THEN polygon WHEN 'GeographicItem::MultiLineString' THEN multi_line_string WHEN 'GeographicItem::MultiPoint' THEN multi_point WHEN 'GeographicItem::GeometryCollection' THEN geometry_collection END".freeze # ANTI_MERIDIAN = '0X0102000020E61000000200000000000000008066400000000000405640000000000080664000000000004056C0' ANTI_MERIDIAN = 'LINESTRING (180 89.0, 180 -89)'.freeze has_many :cached_map_items, inverse_of: :geographic_item has_many :geographic_areas_geographic_items, dependent: :destroy, inverse_of: :geographic_item has_many :geographic_areas, through: :geographic_areas_geographic_items has_many :asserted_distributions, through: :geographic_areas has_many :geographic_area_types, through: :geographic_areas has_many :parent_geographic_areas, through: :geographic_areas, source: :parent has_many :georeferences, inverse_of: :geographic_item has_many :georeferences_through_error_geographic_item, class_name: 'Georeference', foreign_key: :error_geographic_item_id, inverse_of: :error_geographic_item has_many :collecting_events_through_georeferences, through: :georeferences, source: :collecting_event has_many :collecting_events_through_georeference_error_geographic_item, through: :georeferences_through_error_geographic_item, source: :collecting_event # TODO: THIS IS NOT GOOD before_validation :set_type_if_geography_present validate :some_data_is_provided validates :type, presence: true # not needed scope :include_collecting_event, -> { includes(:collecting_events_through_georeferences) } scope :geo_with_collecting_event, -> { joins(:collecting_events_through_georeferences) } scope :err_with_collecting_event, -> { joins(:georeferences_through_error_geographic_item) } after_save :set_cached, unless: Proc.new {|n| n.no_cached || errors.any? } after_save :align_winding class << self def aliased_geographic_sql(name = 'a') "CASE #{name}.type \ WHEN 'GeographicItem::MultiPolygon' THEN #{name}.multi_polygon \ WHEN 'GeographicItem::Point' THEN #{name}.point \ WHEN 'GeographicItem::LineString' THEN #{name}.line_string \ WHEN 'GeographicItem::Polygon' THEN #{name}.polygon \ WHEN 'GeographicItem::MultiLineString' THEN #{name}.multi_line_string \ WHEN 'GeographicItem::MultiPoint' THEN #{name}.multi_point \ WHEN 'GeographicItem::GeometryCollection' THEN #{name}.geometry_collection \ END" end def st_union(geographic_item_scope) GeographicItem.select("ST_Union(#{GeographicItem::GEOMETRY_SQL.to_sql}) as collection") .where(id: geographic_item_scope.pluck(:id)) end def st_collect(geographic_item_scope) GeographicItem.select("ST_Collect(#{GeographicItem::GEOMETRY_SQL.to_sql}) as collection") .where(id: geographic_item_scope.pluck(:id)) end # @return [GeographicItem::ActiveRecord_Relation] # @params [Array] array of geographic area ids def default_by_geographic_area_ids(geographic_area_ids = []) GeographicItem. joins(:geographic_areas_geographic_items). merge(::GeographicAreasGeographicItem.default_geographic_item_data). where(geographic_areas_geographic_items: {geographic_area_id: geographic_area_ids}) end # @param [String] wkt # @return [Boolean] # whether or not the wtk intersects with the anti-meridian # !! StrongParams security considerations def crosses_anti_meridian?(wkt) GeographicItem.find_by_sql( ['SELECT ST_Intersects(ST_GeogFromText(?), ST_GeogFromText(?)) as r;', wkt, ANTI_MERIDIAN] ).first.r end # @param [Integer] ids # @return [Boolean] # whether or not any GeographicItem passed intersects the anti-meridian # !! StrongParams security considerations # This is our first line of defense against queries that define multiple shapes, one or # more of which crosses the anti-meridian. In this case the current TW strategy within the # UI is to abandon the search, and prompt the user to refactor the query. def crosses_anti_meridian_by_id?(*ids) q1 = ["SELECT ST_Intersects((SELECT single_geometry FROM (#{GeographicItem.single_geometry_sql(*ids)}) as " \ 'left_intersect), ST_GeogFromText(?)) as r;', ANTI_MERIDIAN] _q2 = ActiveRecord::Base.send(:sanitize_sql_array, ['SELECT ST_Intersects((SELECT single_geometry FROM (?) as ' \ 'left_intersect), ST_GeogFromText(?)) as r;', GeographicItem.single_geometry_sql(*ids), ANTI_MERIDIAN]) GeographicItem.find_by_sql(q1).first.r end # # SQL fragments # # @param [Integer, String] # @return [String] # a SQL select statement that returns the *geometry* for the geographic_item with the specified id def select_geometry_sql(geographic_item_id) "SELECT #{GeographicItem::GEOMETRY_SQL.to_sql} from geographic_items where geographic_items.id = #{geographic_item_id}" end # @param [Integer, String] # @return [String] # a SQL select statement that returns the geography for the geographic_item with the specified id def select_geography_sql(geographic_item_id) ActiveRecord::Base.send(:sanitize_sql_for_conditions, [ "SELECT #{GeographicItem::GEOMETRY_SQL.to_sql} from geographic_items where geographic_items.id = ?", geographic_item_id]) end # @param [Symbol] choice # @return [String] # a fragment returning either latitude or longitude columns def lat_long_sql(choice) return nil unless [:latitude, :longitude].include?(choice) f = "'D.DDDDDD'" # TODO: probably a constant somewhere v = (choice == :latitude ? 1 : 2) "CASE geographic_items.type WHEN 'GeographicItem::GeometryCollection' THEN split_part(ST_AsLatLonText(ST_Centroid" \ "(geometry_collection::geometry), #{f}), ' ', #{v}) WHEN 'GeographicItem::LineString' THEN split_part(ST_AsLatLonText(ST_Centroid(line_string::geometry), " \ "#{f}), ' ', #{v}) WHEN 'GeographicItem::MultiPolygon' THEN split_part(ST_AsLatLonText(" \ "ST_Centroid(multi_polygon::geometry), #{f}), ' ', #{v}) WHEN 'GeographicItem::Point' THEN split_part(ST_AsLatLonText(" \ "ST_Centroid(point::geometry), #{f}), ' ', #{v}) WHEN 'GeographicItem::Polygon' THEN split_part(ST_AsLatLonText(" \ "ST_Centroid(polygon::geometry), #{f}), ' ', #{v}) WHEN 'GeographicItem::MultiLineString' THEN split_part(ST_AsLatLonText(" \ "ST_Centroid(multi_line_string::geometry), #{f} ), ' ', #{v}) WHEN 'GeographicItem::MultiPoint' THEN split_part(ST_AsLatLonText(" \ "ST_Centroid(multi_point::geometry), #{f}), ' ', #{v}) END as #{choice}" end # @param [Integer] geographic_item_id # @param [Integer] distance # @return [String] def within_radius_of_item_sql(geographic_item_id, distance) "ST_DWithin((#{GeographicItem::GEOGRAPHY_SQL}), (#{select_geography_sql(geographic_item_id)}), #{distance})" end # @param [Integer] geographic_item_id # @param [Number] distance in meters to grow/shrink the shape (negative allowed) # @param [Number] distance (in meters) (positive only?!) # @return [String] def st_buffer_st_within(geographic_item_id, distance, buffer = 0) "ST_DWithin( ST_Buffer(#{GeographicItem::GEOGRAPHY_SQL}, #{buffer}), (#{select_geography_sql(geographic_item_id)}), #{distance} )" end # TODO: 3D is overkill here # @param [String] wkt # @param [Integer] distance (meters) # @return [String] # !! This is intersecting def intersecting_radius_of_wkt_sql(wkt, distance) "ST_DWithin((#{GeographicItem::GEOGRAPHY_SQL}), ST_Transform( ST_GeomFromText('#{wkt}', " \ "4326), 4326), #{distance})" end # @param [String] wkt # @param [Integer] distance (meters) # @return [String] # !! This is fully covering def within_radius_of_wkt_sql(wkt, distance) "ST_Covers( ST_Buffer(ST_SetSRID( ST_GeomFromText('#{wkt}'), 4326)::geography, #{distance}), (#{GeographicItem::GEOGRAPHY_SQL}))" end # @param [String, Integer, String] # @return [String] # a SQL fragment for ST_Contains() function, returns # all geographic items which are contained in the item supplied def containing_sql(target_column_name = nil, geographic_item_id = nil, source_column_name = nil) return 'false' if geographic_item_id.nil? || source_column_name.nil? || target_column_name.nil? "ST_Contains(#{target_column_name}::geometry, (#{geometry_sql(geographic_item_id, source_column_name)}))" end # @param [String, Integer, String] # @return [String] # a SQL fragment for ST_Contains(), returns # all geographic_items which contain the supplied geographic_item def reverse_containing_sql(target_column_name = nil, geographic_item_id = nil, source_column_name = nil) return 'false' if geographic_item_id.nil? || source_column_name.nil? || target_column_name.nil? "ST_Contains((#{geometry_sql(geographic_item_id, source_column_name)}), #{target_column_name}::geometry)" end # @param [Integer, String] # @return [String] # a SQL fragment that represents the geometry of the geographic item specified (which has data in the # source_column_name, i.e. geo_object_type) def geometry_sql(geographic_item_id = nil, source_column_name = nil) return 'false' if geographic_item_id.nil? || source_column_name.nil? "select geom_alias_tbl.#{source_column_name}::geometry from geographic_items geom_alias_tbl " \ "where geom_alias_tbl.id = #{geographic_item_id}" end # rubocop:disable Metrics/MethodLength # @param [String] column_name # @param [GeographicItem] geographic_item # @return [String] of SQL def is_contained_by_sql(column_name, geographic_item) geo_id = geographic_item.id geo_type = geographic_item.geo_object_type template = '(ST_Contains((select geographic_items.%s::geometry from geographic_items where ' \ 'geographic_items.id = %d), %s::geometry))' retval = [] column_name.downcase! case column_name when 'any' DATA_TYPES.each { |column| unless column == :geometry_collection retval.push(template % [geo_type, geo_id, column]) end } when 'any_poly', 'any_line' DATA_TYPES.each { |column| unless column == :geometry_collection if column.to_s.index(column_name.gsub('any_', '')) retval.push(template % [geo_type, geo_id, column]) end end } else retval = template % [geo_type, geo_id, column_name] end retval = retval.join(' OR ') if retval.instance_of?(Array) retval end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] # a select query that returns a single geometry (column name 'single_geometry' for the collection of ids # provided via ST_Collect) def st_collect_sql(*geographic_item_ids) geographic_item_ids.flatten! ActiveRecord::Base.send(:sanitize_sql_for_conditions, [ "SELECT ST_Collect(f.the_geom) AS single_geometry FROM ( SELECT (ST_DUMP(#{GeographicItem::GEOMETRY_SQL.to_sql})).geom as the_geom FROM geographic_items WHERE id in (?)) AS f", geographic_item_ids]) end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] # returns one or more geographic items combined as a single geometry in column 'single' def single_geometry_sql(*geographic_item_ids) a = GeographicItem.st_collect_sql(geographic_item_ids) '(SELECT single.single_geometry FROM (' + a + ' ) AS single)' end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] # returns a single geometry "column" (paren wrapped) as "single" for multiple geographic item ids, or the # geometry as 'geometry' for a single id def geometry_sql2(*geographic_item_ids) geographic_item_ids.flatten! # *ALWAYS* reduce the pile to a single level of ids if geographic_item_ids.count == 1 "(#{GeographicItem.geometry_for_sql(geographic_item_ids.first)})" else GeographicItem.single_geometry_sql(geographic_item_ids) end end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] def containing_where_sql(*geographic_item_ids) "ST_CoveredBy( #{GeographicItem.geometry_sql2(*geographic_item_ids)}, CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN multi_polygon::geometry WHEN 'GeographicItem::Point' THEN point::geometry WHEN 'GeographicItem::LineString' THEN line_string::geometry WHEN 'GeographicItem::Polygon' THEN polygon::geometry WHEN 'GeographicItem::MultiLineString' THEN multi_line_string::geometry WHEN 'GeographicItem::MultiPoint' THEN multi_point::geometry END)" end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] def containing_where_sql_geog(*geographic_item_ids) "ST_CoveredBy( #{GeographicItem.geometry_sql2(*geographic_item_ids)}, CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN multi_polygon::geography WHEN 'GeographicItem::Point' THEN point::geography WHEN 'GeographicItem::LineString' THEN line_string::geography WHEN 'GeographicItem::Polygon' THEN polygon::geography WHEN 'GeographicItem::MultiLineString' THEN multi_line_string::geography WHEN 'GeographicItem::MultiPoint' THEN multi_point::geography END)" end # @param [Interger, Array of Integer] ids # @return [Array] # If we detect that some query id has crossed the meridian, then loop through # and "manually" build up a list of results. # Should only be used if GeographicItem.crosses_anti_meridian_by_id? is true. # Note that this does not return a Scope, so you can't chain it like contained_by? # TODO: test this def contained_by_with_antimeridian_check(*ids) ids.flatten! # make sure there is only one level of splat (*) results = [] crossing_ids = [] ids.each do |id| # push each which crosses crossing_ids.push(id) if GeographicItem.crosses_anti_meridian_by_id?(id) end non_crossing_ids = ids - crossing_ids results.push GeographicItem.contained_by(non_crossing_ids).to_a if non_crossing_ids.any? crossing_ids.each do |id| # [61666, 61661, 61659, 61654, 61639] q1 = ActiveRecord::Base.send(:sanitize_sql_array, ['SELECT ST_AsText((SELECT polygon FROM geographic_items ' \ 'WHERE id = ?))', id]) r = GeographicItem.where( # GeographicItem.contained_by_wkt_shifted_sql(GeographicItem.find(id).geo_object.to_s) GeographicItem.contained_by_wkt_shifted_sql( ApplicationRecord.connection.execute(q1).first['st_astext']) ).to_a results.push(r) end results.flatten.uniq end # @params [String] well known text # @return [String] the SQL fragment for the specific geometry type, shifted by longitude # Note: this routine is called when it is already known that the A argument crosses anti-meridian def contained_by_wkt_shifted_sql(wkt) "ST_Contains(ST_ShiftLongitude(ST_GeomFromText('#{wkt}', 4326)), ( CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN ST_ShiftLongitude(multi_polygon::geometry) WHEN 'GeographicItem::Point' THEN ST_ShiftLongitude(point::geometry) WHEN 'GeographicItem::LineString' THEN ST_ShiftLongitude(line_string::geometry) WHEN 'GeographicItem::Polygon' THEN ST_ShiftLongitude(polygon::geometry) WHEN 'GeographicItem::MultiLineString' THEN ST_ShiftLongitude(multi_line_string::geometry) WHEN 'GeographicItem::MultiPoint' THEN ST_ShiftLongitude(multi_point::geometry) END ) )" end # TODO: Remove the hard coded 4326 reference # @params [String] wkt # @return [String] SQL fragment limiting geographics items to those in this WKT def contained_by_wkt_sql(wkt) if crosses_anti_meridian?(wkt) retval = contained_by_wkt_shifted_sql(wkt) else retval = "ST_Contains(ST_GeomFromText('#{wkt}', 4326), ( CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN multi_polygon::geometry WHEN 'GeographicItem::Point' THEN point::geometry WHEN 'GeographicItem::LineString' THEN line_string::geometry WHEN 'GeographicItem::Polygon' THEN polygon::geometry WHEN 'GeographicItem::MultiLineString' THEN multi_line_string::geometry WHEN 'GeographicItem::MultiPoint' THEN multi_point::geometry END ) )" end retval end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] sql for contained_by via ST_ContainsProperly # Note: Can not use GEOMETRY_SQL because geometry_collection is not supported in ST_ContainsProperly # Note: !! If the target GeographicItem#id crosses the anti-meridian then you may/will get unexpected results. def contained_by_where_sql(*geographic_item_ids) "ST_Contains( #{GeographicItem.geometry_sql2(*geographic_item_ids)}, CASE geographic_items.type WHEN 'GeographicItem::MultiPolygon' THEN multi_polygon::geometry WHEN 'GeographicItem::Point' THEN point::geometry WHEN 'GeographicItem::LineString' THEN line_string::geometry WHEN 'GeographicItem::Polygon' THEN polygon::geometry WHEN 'GeographicItem::MultiLineString' THEN multi_line_string::geometry WHEN 'GeographicItem::MultiPoint' THEN multi_point::geometry END)" end # @param [RGeo:Point] rgeo_point # @return [String] sql for containing via ST_CoveredBy # TODO: Remove the hard coded 4326 reference # TODO: should this be wkt_point instead of rgeo_point? def containing_where_for_point_sql(rgeo_point) "ST_CoveredBy( ST_GeomFromText('#{rgeo_point}', 4326), #{GeographicItem::GEOMETRY_SQL.to_sql} )" end # @param [Interger] geographic_item_id # @return [String] SQL for geometries # example, not used def geometry_for_sql(geographic_item_id) 'SELECT ' + GeographicItem::GEOMETRY_SQL.to_sql + ' AS geometry FROM geographic_items WHERE id = ' \ "#{geographic_item_id} LIMIT 1" end # @param [Interger, Array of Integer] geographic_item_ids # @return [String] SQL for geometries # example, not used def geometry_for_collection_sql(*geographic_item_ids) 'SELECT ' + GeographicItem::GEOMETRY_SQL.to_sql + ' AS geometry FROM geographic_items WHERE id IN ' \ "( #{geographic_item_ids.join(',')} )" end # # Scopes # # @param [Interger, Array of Integer] geographic_item_ids # @return [Scope] # the geographic items containing these collective geographic_item ids, not including self def containing(*geographic_item_ids) where(GeographicItem.containing_where_sql(geographic_item_ids)).not_ids(*geographic_item_ids) end # @param [Interger, Array of Integer] geographic_item_ids # @return [Scope] # the geographic items contained by any of these geographic_item ids, not including self # (works via ST_ContainsProperly) def contained_by(*geographic_item_ids) where(GeographicItem.contained_by_where_sql(geographic_item_ids)) end # @param [RGeo::Point] rgeo_point # @return [Scope] # the geographic items containing this point # TODO: should be containing_wkt ? def containing_point(rgeo_point) where(GeographicItem.containing_where_for_point_sql(rgeo_point)) end # @return [Scope] # adds an area_in_meters field, with meters def with_area select("ST_Area(#{GeographicItem::GEOGRAPHY_SQL}, false) as area_in_meters") end # return [Scope] # A scope that limits the result to those GeographicItems that have a collecting event # through either the geographic_item or the error_geographic_item # # A raw SQL join approach for comparison # # GeographicItem.joins('LEFT JOIN georeferences g1 ON geographic_items.id = g1.geographic_item_id'). # joins('LEFT JOIN georeferences g2 ON geographic_items.id = g2.error_geographic_item_id'). # where("(g1.geographic_item_id IS NOT NULL OR g2.error_geographic_item_id IS NOT NULL)").uniq # @return [Scope] GeographicItem # This uses an Arel table approach, this is ultimately more decomposable if we need. Of use: # http://danshultz.github.io/talks/mastering_activerecord_arel <- best # https://github.com/rails/arel # http://stackoverflow.com/questions/4500629/use-arel-for-a-nested-set-join-query-and-convert-to-activerecordrelation # http://rdoc.info/github/rails/arel/Arel/SelectManager # http://stackoverflow.com/questions/7976358/activerecord-arel-or-condition # def with_collecting_event_through_georeferences geographic_items = GeographicItem.arel_table georeferences = Georeference.arel_table g1 = georeferences.alias('a') g2 = georeferences.alias('b') c = geographic_items.join(g1, Arel::Nodes::OuterJoin).on(geographic_items[:id].eq(g1[:geographic_item_id])) .join(g2, Arel::Nodes::OuterJoin).on(geographic_items[:id].eq(g2[:error_geographic_item_id])) GeographicItem.joins(# turn the Arel back into scope c.join_sources # translate the Arel join to a join hash(?) ).where( g1[:id].not_eq(nil).or(g2[:id].not_eq(nil)) # returns a Arel::Nodes::Grouping ).distinct end # @return [Scope] include a 'latitude' column def with_latitude select(lat_long_sql(:latitude)) end # @return [Scope] include a 'longitude' column def with_longitude select(lat_long_sql(:longitude)) end # @param [String, GeographicItems] # @return [Scope] def intersecting(column_name, *geographic_items) if column_name.downcase == 'any' pieces = [] DATA_TYPES.each { |column| pieces.push(GeographicItem.intersecting(column.to_s, geographic_items).to_a) } # @TODO change 'id in (?)' to some other sql construct GeographicItem.where(id: pieces.flatten.map(&:id)) else q = geographic_items.flatten.collect { |geographic_item| "ST_Intersects(#{column_name}, '#{geographic_item.geo_object}' )" # seems like we want this: http://danshultz.github.io/talks/mastering_activerecord_arel/#/15/2 }.join(' or ') where(q) end end # @param [GeographicItem#id] geographic_item_id # @param [Float] distance in meters ?!?! # @return [ActiveRecord::Relation] # !! should be distance, not radius?! def within_radius_of_item(geographic_item_id, distance) where(within_radius_of_item_sql(geographic_item_id, distance)) end # @param [String, GeographicItem] # @return [Scope] # a SQL fragment for ST_DISJOINT, specifies all geographic_items that have data in column_name # that are disjoint from the passed geographic_items def disjoint_from(column_name, *geographic_items) q = geographic_items.flatten.collect { |geographic_item| "ST_DISJOINT(#{column_name}::geometry, (#{geometry_sql(geographic_item.to_param, geographic_item.geo_object_type)}))" }.join(' and ') where(q) end # @return [Scope] # see are_contained_in_item_by_id # @param [String] column_name # @param [GeographicItem, Array] geographic_items def are_contained_in_item(column_name, *geographic_items) are_contained_in_item_by_id(column_name, geographic_items.flatten.map(&:id)) end # rubocop:disable Metrics/MethodLength # @param [String] column_name to search # @param [GeographicItem] geographic_item_ids or array of geographic_item_ids to be tested. # @return [Scope] of GeographicItems # # If this scope is given an Array of GeographicItems as a second parameter, # it will return the 'OR' of each of the objects against the table. # SELECT COUNT(*) FROM "geographic_items" # WHERE (ST_Contains(polygon::geometry, GeomFromEWKT('srid=4326;POINT (0.0 0.0 0.0)')) # OR ST_Contains(polygon::geometry, GeomFromEWKT('srid=4326;POINT (-9.8 5.0 0.0)'))) # def are_contained_in_item_by_id(column_name, *geographic_item_ids) # = containing geographic_item_ids.flatten! # in case there is a array of arrays, or multiple objects column_name.downcase! case column_name when 'any' part = [] DATA_TYPES.each { |column| unless column == :geometry_collection part.push(GeographicItem.are_contained_in_item_by_id(column.to_s, geographic_item_ids).to_a) end } # TODO: change 'id in (?)' to some other sql construct GeographicItem.where(id: part.flatten.map(&:id)) when 'any_poly', 'any_line' part = [] DATA_TYPES.each { |column| if column.to_s.index(column_name.gsub('any_', '')) part.push(GeographicItem.are_contained_in_item_by_id("#{column}", geographic_item_ids).to_a) end } # TODO: change 'id in (?)' to some other sql construct GeographicItem.where(id: part.flatten.map(&:id)) else q = geographic_item_ids.flatten.collect { |geographic_item_id| # discover the item types, and convert type to database type for 'multi_' b = GeographicItem.where(id: geographic_item_id) .pluck(:type)[0].split(':')[2].downcase.gsub('lti', 'lti_') # a = GeographicItem.find(geographic_item_id).geo_object_type GeographicItem.containing_sql(column_name, geographic_item_id, b) }.join(' or ') q = 'FALSE' if q.blank? # this will prevent the invocation of *ALL* of the GeographicItems, if there are # no GeographicItems in the request (see CollectingEvent.name_hash(types)). where(q) # .not_including(geographic_items) end end # rubocop:enable Metrics/MethodLength # @param [String] column_name # @param [String] geometry of WKT # @return [Scope] # a single WKT geometry is compared against column or columns (except geometry_collection) to find geographic_items # which are contained in the WKT def are_contained_in_wkt(column_name, geometry) column_name.downcase! # column_name = 'point' case column_name when 'any' part = [] DATA_TYPES.each { |column| unless column == :geometry_collection part.push(GeographicItem.are_contained_in_wkt(column.to_s, geometry).pluck(:id).to_a) end } # TODO: change 'id in (?)' to some other sql construct GeographicItem.where(id: part.flatten) when 'any_poly', 'any_line' |