Module: Utilities::Geo
- Defined in:
- lib/utilities/geo.rb
Overview
Special general routines for Geo-specific itams
Defined Under Namespace
Classes: CoordinatesFromLabel
Constant Summary collapse
- SPECIAL_LATLONG_SYMBOLS =
degree symbols, in addition to 'd', 'o', and '*' u00b0 “°” u00ba “º” u02da “˚” u030a “?” u221e “∞” u222b “∫”
tick symbols, in addition to “'” (“u0027”“), and '”' (“u0022”) u00a5 “¥” u00b4 “´” u02B9 “ʹ” u02BA “ʺ” u02BB “ʻ” u02BC “ʼ” u02CA “ˊ” u02EE “ˮ” u2032 “′” u2033 “″” u2019 “’” u201D “”” added June 2020
Significant figures/digits: any of the digits of a number beginning with the digit farthest to the left that is not zero and ending with the last digit farthest to the right that is either not zero or that is a zero but is considered to be exact
"do*\u00b0\u00ba\u02DA\u030a\u221e\u222b\u0027\u00b4\u02B9\u02BA\u02BB\u02BC\u02CA\u02EE\u2032\u2033\u0022\u2019\u201D".freeze
- LAT_LON_REGEXP =
Regexp.new(/(?<lat>-?\d+\.?\d*),?\s*(?<long>-?\d+\.?\d*)/)
- ONE_WEST =
EARTH_RADIUS = 6371000 # km, 3959 miles (mean Earth radius) # Not used? RADIANS_PER_DEGREE = ::Math::PI/180.0 DEGREES_PER_RADIAN = 180.0/::Math::PI
111_319.490779206
- ONE_NORTH =
ONE_WEST = 111_319.444444444 # meters/degree (calculated mean)
110_574.38855796
- REGEXP_COORD =
' = u0027, converted so that the regex can be used for SQL Added Unicode right single (u2019) and double (u201D) quote as minutes seconds
{ # tt1: /\D?(?<lat>\d+\.\d+\s*(?<ca>[NS])*)\s(?<long>\d+\.\d+\s*(?<co>[EW])*)/i, dd1a: {reg: /(?<lat>\d+\.\d+\s*[NS])\s*(?<long>\d+\.\d+\s*[EW])/i, hlp: 'decimal degrees, trailing ordinal, e.g. 23.23N 44.44W'}, dd1b: {reg: /(?<lat>[NS]\s*\d+\.\d+)\s*(?<long>[EW]\s*\d+\.\d+)/i, hlp: 'decimal degrees, leading ordinal, e.g. N23.23 W44.44'}, dd2: {reg: /(?<lat>\d+[\. ]\d+\u0027?\s*[NS]),?\s*(?<long>\d+[\. ]\d+\u0027?\s*[EW])/i, hlp: "decimal degrees, trailing ordinal, e.g. 43.836' N, 89.258' W"}, dm1: {reg: /(?<lat>\d+\s*[\*°o\u02DA ](\d+[\.,]\d+|\d+)\s*[ ´\u0027\u02B9\u02BC\u02CA\u2019]?\s*[NS])[\.,;]?\s*(?<long>\d+\s*[\*°ºo\u02DA ](\d+[\.,]\d+|\d+)\s*[ ´\u0027\u02B9\u02BC\u02CA\u2019]?\s*[WE])/i, hlp: "degrees, decimal minutes, trailing ordinal, e.g. 45 54.2'N, 78 43.5'E"}, dms2: {reg: /(?<lat>[NS]\.?\s*\d+\s*[\*°ºo\u02DA ]\s*\d+\s*[ ´\u0027\u02B9\u02BC\u02CA\u2019]\s*(\d+[\.,]\d+|\d+)\s*[ "´\u02BA\u02EE\u0027\u02B9\u02BC\u02CA\u201D][´\u0027\u02B9\u02BC\u02CA]?)[\.,;]?\s*(?<long>[WE]\.?\s*\d+\s*[\*°ºo\u02DA ]\s*\d+\s*[ \u0027´\u02B9\u02BC\u02CA\u2019]\s*(\d+[\.,]\d+|\d+)\s*[ "´\u02BA\u02EE\u0027\u02B9\u02BC\u02CA\u201D]?[´\u0027\u02B9\u02BC\u02CA]?)/i, hlp: "degrees, minutes, decimal seconds, leading ordinal, e.g. S42°5'18.1\" W88º11'43.3\""}, dm3: {reg: /(?<lat>[NS]\.?\s*\d+\s*[\*°ºo\u02DA ]\s*(\d+[\.,]\d+|\d+)\s*([ ´\u0027\u02B9\u02BC\u02CA\u2019]))[\.,;]?\s*(?<long>[WE]\.?\s*\d+\s*[\*°ºo\u02DA ]\s*(\d+[\.,]\d+|\d+)\s*[ ´\u0027\u02B9\u02BC\u02CA\u2019]?)/i, hlp: "degrees, decimal minutes, leading ordinal, e.g. S42º5.18' W88°11.43'"}, dms4: {reg: /(?<lat>\d+\s*[\*°ºo\u02DA ]\s*(\d+[\.,]\d+|\d+)\s*[ ´\u0027\u02B9\u02BC\u02CA\u2019]?\s*(\d+[\.,]\d+|\d+)["\u201D]?\s*[NS])\s*(?<long>\d+\s*[\*°ºo\u02DA ]\s*(\d+[\.,]\d+|\d+)\s*[ ´\u0027\u02B9\u02BC\u02CA\u2019]?\s*(\d+[\.,]\d+|\d+)+["\u201D]?\s*[EW])/i, hlp: "degrees, minutes, decimal seconds, trailing ordinal, e.g. 24º7'2.0\"S65º24'13.1\"W"}, dd5: {reg: /(?<lat>[NS]\.?\s*(\d+[\.,]\d+|\d+)\s*[\*°ºo\u02DA ])[\.,;]?\s*(?<long>([WE])\.?\s*(\d+[\.,]\d+|\d+)\s*[\*°ºo\u02DA ]?)/i, hlp: 'decimal degrees, leading ordinal, e.g. S42.18° W88.34°'}, dd6: {reg: /(?<lat>(\d+[\.,]\d+|\d+)\s*[\*°ºo\u02DA ]\s*[NS])[\.,;]?\s*(?<long>(\d+[\.|,]\d+|\d+)\s*[\*°ºo\u02DA ]\s*[WE])/i, hlp: 'decimal degrees, trailing ordinal, e.g. 42.18°S 88.43°W'}, dd7: {reg: /\[(?<lat>-?\d+[\.,]\d+|\-?d+),.*?(?<long>-?\d+[\.,]\d+|\-?d+)\]/i, hlp: 'decimal degrees, no ordinal, specific format, e.g. [12.263, -49.398]'} }.freeze
Class Method Summary collapse
-
.conform_significant(number, sig_digits) ⇒ String
conform number to significant digits as string.
-
.coordinates_regex_from_verbatim_label(text) ⇒ Hash
coordinates from the label parsed to elements.
-
.degrees_minutes_seconds_to_decimal_degrees(dms_in) ⇒ Float
rubocop:disable Metrics/MethodLength 42∞5'18.1“S88∞11'43.3”W S42∞5'18.1“W88∞11'43.3” S42∞5.18'W88∞11.43' 42∞5.18'S88∞11.43'W S42.18∞W88.34∞ 42.18∞S88.43∞W -12.263, 49.398.
-
.distance_in_meters(dist_in) ⇒ String
12345 (presume meters) 123.45 123 ft > 123 ft.
-
.error_box_for_point(geo_object, error_radius) ⇒ RGeo::Polygon
confirm that this says that the error radius is one degree or smaller.
-
.hunt_lat_long(label, how = ' ') ⇒ Hash
rubocop:disable Metrics/MethodLength, Metrics/BlockNesting.
-
.hunt_lat_long_full(label, filters = REGEXP_COORD.keys) ⇒ Array
Of possible coordinate strings.
- .hunt_wrapper(label, filters = REGEXP_COORD.keys) ⇒ Array
- .is_lat_long_special(c) ⇒ Boolean
-
.nearby_from_params(params) ⇒ Integer
rubocop:disable Metrics/MethodLength.
-
.significant_digits(number_string) ⇒ Array
determine number of significant digits in string input argument.
Instance Method Summary collapse
-
#diamond_error_box ⇒ RGeo::Polygon
make a diamond 2 * radius tall and 2 * radius wide, with the reference point as center NOT TESTED/USED.
- #uni_string(char) ⇒ String
Class Method Details
.conform_significant(number, sig_digits) ⇒ String
conform number to significant digits as string
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# File 'lib/utilities/geo.rb', line 510 def self.conform_significant(number, sig_digits) input = significant_digits(number.to_s) input_string = input[0] intg = input[2] decimal_point = input[3] decimal_position = input_string.index('.') decimal_point_zeros = input[4] # decimal_point_zeros length > 0 implies mantissa only case mantissa = input[5] # mantissa complete iff no decimal_point_zeros digit_string = intg + decimal_point_zeros + mantissa reduction = input[1] - sig_digits result = digit_string # failsafe result if reduction > 0 # need to reduce significant digits result = '' for index in (0...sig_digits) # collect ONLY significant digits digit = digit_string[index] # if number is "0", digit is nil result += digit next end if digit_string.length > sig_digits # clean up integer least significant digits if sig_digits > 0 # test degenerate case of 0 input if digit_string[index + 1].to_i >= 5 result = (result.to_i + 1).to_s # round if necessary end end for ndex in (0...(intg.length - sig_digits)) result += '0' next end end else # no reduction or add digits for ndex in (0...(sig_digits - digit_string.length)) result += '0' next end end unless decimal_position.nil? # this devolves to if decimal_position = 0, prepend "0." OR # if decimal_position == end of string, don't add decimal_point # otherwise add decimal_point at decimal_position if result.length <= sig_digits if decimal_position == 0 result.insert(decimal_position, '0' + decimal_point) # make a valid Ruby number else if decimal_position < sig_digits result.insert(decimal_position, decimal_point) end end end end result end |
.coordinates_regex_from_verbatim_label(text) ⇒ Hash
coordinates from the label parsed to elements
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# File 'lib/utilities/geo.rb', line 566 def self.coordinates_regex_from_verbatim_label(text) return nil if text.blank? text = ' ' + text + ' ' text.gsub("''", '"') .gsub("´´", '"') .gsub("ʹʹ", '"') .gsub("ʼʼ", '"') .gsub("ˊˊ", '"') coordinates = {} # pattern: 42°5'18.1"S88°11'43.3"W if matchdata1 = text.match(/\D(\d+) ?[\*°ººod˚ ] ?(\d+) ?[ '´ʹ΄′ʼ’ˊ‘] ?(\d+[\.|,]\d+|\d+) ?[ "ʺ″”ˮ'´ʹ′΄ʼ’ˊ‘]['´ʹ′΄ʼ’ˊ‘]? ?([nN]|[sS])[\.,;]? ?(\d+) ?[\*°ººod˚ ] ?(\d+) ?[ '´ʹ′΄ʼ’ˊ‘]\ ?(\d+[\.|,]\d+|\d+) ?[ "ʺ″”ˮ'´ʹ′΄ʼ’ˊ‘]['´ʹ′΄ʼ’ˊ‘]? ?([wW]|[eE])\W/) coordinates[:lat_deg] = matchdata1[1] coordinates[:lat_min] = matchdata1[2] coordinates[:lat_sec] = matchdata1[3] coordinates[:lat_ns] = matchdata1[4] coordinates[:long_deg] = matchdata1[5] coordinates[:long_min] = matchdata1[6] coordinates[:long_sec] = matchdata1[7] coordinates[:long_we] = matchdata1[8] # pattern: S42°5'18.1"W88°11'43.3" elsif matchdata2 = text.match(/\W([nN]|[sS])\.? ?(\d+) ?[\*°ººod˚ ] ?(\d+) ?[ '´ʹ′΄ʼ’ˊ‘] ?(\d+[\.|,]\d+|\d+) ?[ "ʺ″”ˮ'´ʹ′΄ʼ’ˊ‘]['´ʹ′΄ʼ’ˊ‘]?[\.,;]? ?([wW]|[eE])\.? ?(\d+) ?[\*°ººod˚ ] ?(\d+) ?[ '´ʹ′΄ʼ’ˊ‘] ?(\d+[\.|,]\d+|\d+) ?[ "ʺ″”ˮ'´ʹ′΄ʼ’ˊ‘]?['´ʹ′΄ʼ’ˊ‘]?\D/) coordinates[:lat_deg] = matchdata2[2] coordinates[:lat_min] = matchdata2[3] coordinates[:lat_sec] = matchdata2[4] coordinates[:lat_ns] = matchdata2[1] coordinates[:long_deg] = matchdata2[6] coordinates[:long_min] = matchdata2[7] coordinates[:long_sec] = matchdata2[8] coordinates[:long_we] = matchdata2[5] # pattern: S42°5.18'W88°11.43' elsif matchdata3 = text.match(/\W([nN]|[sS])\.? ?(\d+) ?[\*°ººod˚ ] ?(\d+[\.|,]\d+|\d+) ?[ '´ʹ′΄ʼ’ˊ‘][\.,;]? ?([wW]|[eE])\.? ?(\d+) ?[\*°ººod˚ ] ?(\d+[\.|,]\d+|\d+) ?[ '´ʹ′΄ʼ’ˊ‘]?\D/) coordinates[:lat_deg] = matchdata3[2] coordinates[:lat_min] = matchdata3[3] coordinates[:lat_ns] = matchdata3[1] coordinates[:long_deg] = matchdata3[5] coordinates[:long_min] = matchdata3[6] coordinates[:long_we] = matchdata3[4] # pattern: 42°5.18'S88°11.43'W elsif matchdata4 = text.match(/\D(\d+) ?[\*°ººod˚ ] ?(\d+[\.|,]\d+|\d+) ?[ '´ʹ′΄ʼ’ˊ‘]? ?([nN]|[sS])[\.,;]? ?(\d+) ?[\*°ººod˚ ] ?(\d+[\.|,]\d+|\d+) ?[ '´ʹ′΄ʼ’ˊ‘]? ?([wW]|[eE])\W/) coordinates[:lat_deg] = matchdata4[1] coordinates[:lat_min] = matchdata4[2] coordinates[:lat_ns] = matchdata4[3] coordinates[:long_deg] = matchdata4[4] coordinates[:long_min] = matchdata4[5] coordinates[:long_we] = matchdata4[6] # pattern: 42.18°S88.43°W elsif matchdata6 = text.match(/\D(\d+[\.|,]\d+|\d+) ?[\*°ººod˚ ] ?([nN]|[sS])[\.,;]? ?(\d+[\.|,]\d+|\d+) ?[\*°ººod˚ ] ?([wW]|[eE])\W/) coordinates[:lat_deg] = matchdata6[1] coordinates[:lat_ns] = matchdata6[2] coordinates[:long_deg] = matchdata6[3] coordinates[:long_we] = matchdata6[4] # pattern: S42.18°W88.34° elsif matchdata5 = text.match(/\W([nN]|[sS])\.? ?(\d+[\.|,]\d+|\d+) ?[\*°ººod˚ ][\.,;]? ?([wW]|[eE])\.? ?(\d+[\.|,]\d+|\d+) ?[\*°ººod˚ ]?\D/) coordinates[:lat_deg] = matchdata5[2] coordinates[:lat_ns] = matchdata5[1] coordinates[:long_deg] = matchdata5[4] coordinates[:long_we] = matchdata5[3] # pattern: -12.263, 49.398 elsif matchdata7 = text.match(/\D(-?\d+[\.|,]\d+|\-?\d+),.*?(-?\d+[\.|,]\d+|\-?\d+)\D/) coordinates[:lat_deg] = matchdata7[1] coordinates[:long_deg] = matchdata7[2] end coordinates[:lat_deg] = coordinates[:lat_deg].gsub(',', '.') if coordinates[:lat_deg] coordinates[:lat_min] = coordinates[:lat_min].gsub(',', '.') if coordinates[:lat_min] coordinates[:lat_sec] = coordinates[:lat_sec].gsub(',', '.') if coordinates[:lat_sec] coordinates[:lat_ns] = coordinates[:lat_ns].capitalize if coordinates[:lat_ns] coordinates[:long_deg] = coordinates[:long_deg].gsub(',', '.') if coordinates[:long_deg] coordinates[:long_min] = coordinates[:long_min].gsub(',', '.') if coordinates[:long_min] coordinates[:long_sec] = coordinates[:long_sec].gsub(',', '.') if coordinates[:long_sec] coordinates[:lat_we] = coordinates[:lat_we].capitalize if coordinates[:lat_we] return {} if !coordinates[:lat_deg] || !coordinates[:long_deg] return {} if coordinates[:lat_deg].to_f > 90 || coordinates[:lat_deg].to_f < -90 return {} if coordinates[:lat_min].to_f >= 60 return {} if coordinates[:lat_sec].to_f >= 60 return {} if coordinates[:long_deg].to_f > 180 || coordinates[:long_deg].to_f < -180 return {} if coordinates[:long_min].to_f >= 60 return {} if coordinates[:long_sec].to_f >= 60 if coordinates[:lat_ns].nil? lat_string = coordinates[:lat_deg] if coordinates[:lat_deg].to_f < 0 # -5° S; 5° N coordinates[:lat_ns] = 'S' coordinates[:lat_deg] = coordinates[:lat_deg].gsub('-', '') else coordinates[:lat_ns] = 'N' # -5° W; 5° E end else lat_string = coordinates[:lat_deg] + '°' lat_string += coordinates[:lat_min] + "'" if coordinates[:lat_min] lat_string += coordinates[:lat_sec] + '"' if coordinates[:lat_sec] lat_string += coordinates[:lat_ns] end if coordinates[:long_we].nil? long_string = coordinates[:long_deg] if coordinates[:long_deg].to_f < 0 coordinates[:long_we] = 'W' coordinates[:long_deg] = coordinates[:long_deg].gsub('-', '') else coordinates[:long_we] = 'E' end else long_string = coordinates[:long_deg] + '°' long_string += coordinates[:long_min] + "'" if coordinates[:long_min] long_string += coordinates[:long_sec] + '"' if coordinates[:long_sec] long_string += coordinates[:long_we] end lat_dec = (coordinates[:lat_deg].to_f + (coordinates[:lat_min].to_f / 60) + (coordinates[:lat_sec].to_f / 3600)).round(6).to_s lat_dec = '-' + lat_dec if coordinates[:lat_ns] == 'S' long_dec = (coordinates[:long_deg].to_f + (coordinates[:long_min].to_f / 60) + (coordinates[:long_sec].to_f / 3600)).round(6).to_s long_dec = '-' + long_dec if coordinates[:long_we] == 'W' c = { verbatim: {verbatim_latitude: lat_string, verbatim_longitude: long_string}, decimal: {decimal_latitude: lat_dec, decimal_longitude: long_dec}, parsed: coordinates } return c end |
.degrees_minutes_seconds_to_decimal_degrees(dms_in) ⇒ Float
rubocop:disable Metrics/MethodLength 42∞5'18.1“S88∞11'43.3”W S42∞5'18.1“W88∞11'43.3” S42∞5.18'W88∞11.43' 42∞5.18'S88∞11.43'W S42.18∞W88.34∞ 42.18∞S88.43∞W -12.263, 49.398
42:5:18.1N 88:11:43.3W
no limit test, unless there is a ordinal letter included
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# File 'lib/utilities/geo.rb', line 276 def self.degrees_minutes_seconds_to_decimal_degrees(dms_in) # rubocop:disable Metrics/PerceivedComplexity !! But this is too complex :) match_string = nil # no_point = false degrees = 0.0 minutes = 0.0 seconds = 0.0 # make SURE it is a string! Watch out for dms_in == -10 dms_in = dms_in.to_s dms = dms_in.dup.upcase dms = dms.gsub('DEG', 'º').gsub('DG', 'º') dms =~ /[NSEW]/i ordinal = $LAST_MATCH_INFO.to_s # return "#{dms}: Too many letters (#{ordinal})" if ordinal.length > 1 # return nil if ordinal.length > 1 dms = dms.gsub!(ordinal, '').strip.downcase if dms.include? '.' no_point = false if dms.include? ':' # might be '42:5.1' /(?<degrees>-*\d+):(?<minutes>\d+\.*\d*)(:(?<seconds>\d+\.*\d*))*/ =~ dms match_string = $& # rubocop:disable Style/IdenticalConditionalBranches else # this will get over-ridden if the next regex matches /(?<degrees>-*\d+\.\d+)/ =~ dms match_string = $& # rubocop:disable Style/IdenticalConditionalBranches end else no_point = true end # >40°26′46″< >40°26′46″< dms.each_char {|c| next unless SPECIAL_LATLONG_SYMBOLS.include?(c) /^(?<degrees>-*\d{0,3}(\.\d+)*) # + or - three-digit number with optional '.' and additional decimal digits [do*\u00b0\u00ba\u02DA\u030a\u221e\u222b\uc2ba]*\s* # optional special degrees symbol, optional space (?<minutes>\d+\.*\d*)* # optional number, integer or floating-point ['\u00a5\u00b4\u02b9\u02bb\u02bc\u02ca\u2032\uc2ba\u2019]*\s* # optional special minutes symbol, optional space ((?<seconds>\d+\.*\d*) # optional number, integer or floating-point ['\u00a5\u00b4\u02b9\u02ba\u02bb\u02bc\u02ca\u02ee\u2032\u2033\uc2ba"\u201D]+)* # optional special seconds symbol, optional space /x =~ dms # '/(regexp)/x' modifier permits inline comments for regexp match_string = $& break # bail on the first character match } degrees = dms.to_f if match_string.nil? && no_point # @match_string = $& degrees = degrees.to_f case ordinal when 'W', 'S' sign = -1.0 else sign = 1.0 end if degrees < 0 sign *= -1 degrees *= -1.0 end frac = ((minutes.to_f * 60.0) + seconds.to_f) / 3600.0 dd = (degrees + frac) * sign case ordinal when 'N', 'S' limit = 90.0 else limit = 180.0 end # return "#{dms}: Out of range (#{dd})" if dd.abs > limit return nil if dd.abs > limit || dd == 0.0 dd.round(6).to_s end |
.distance_in_meters(dist_in) ⇒ String
12345 (presume meters) 123.45 123 ft > 123 ft. > 123 feet > 1 foot > 123 f > 123 f. 123 m > 123 meters > 123 m. 123 km > 123 km. > 123 kilometers 123 mi > 123 milee > 123 miles
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# File 'lib/utilities/geo.rb', line 81 def self.distance_in_meters(dist_in) dist_in = '0.0 meters' if dist_in.blank? elevation = dist_in.strip.downcase pieces = elevation.split(' ') # value = elevation.to_f if pieces.count > 1 # two pieces, second is distance unit piece = 1 else # one piece, may contain distance unit. piece = 0 end value = pieces[0] scale = 1 # default is meters /(?<ft>f[oe]*[t]*\.*)|(?<m>[^k]m(eters)*[\.]*)|(?<km>kilometer(s)*|k[m]*[\.]*)|(?<mi>mi(le(s)*)*)/ =~ pieces[piece] # scale = $& scale = 1 unless m.blank? # previously 1.0 scale = 0.3048 unless ft.blank? scale = 1000 unless km.blank? # previously 1000.0 scale = 1_609.344 unless mi.blank? value_sig = significant_digits(value.to_s) if value_sig[0].include?('.') s_value = value_sig[0].to_f else s_value = value_sig[0].to_i end s_sig = value_sig[1] distance = s_value * scale distance = conform_significant(distance.to_s, s_sig) ####### previously .to_f distance end |
.error_box_for_point(geo_object, error_radius) ⇒ RGeo::Polygon
confirm that this says that the error radius is one degree or smaller
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# File 'lib/utilities/geo.rb', line 405 def self.error_box_for_point(geo_object, error_radius) # this limits the actual error_box to 10k FOR THIS TEST ONLY! error_radius = 10_000 if error_radius > 10_000 p0 = geo_object delta_x = (error_radius / ONE_WEST) / Math.cos(p0.y * Math::PI / 180) delta_y = error_radius / ONE_NORTH Gis::FACTORY.polygon( Gis::FACTORY.line_string( [ Gis::FACTORY.point(p0.x - delta_x, p0.y + delta_y), # northwest Gis::FACTORY.point(p0.x + delta_x, p0.y + delta_y), # northeast Gis::FACTORY.point(p0.x + delta_x, p0.y - delta_y), # southeast Gis::FACTORY.point(p0.x - delta_x, p0.y - delta_y) # southwest ] ) ) end |
.hunt_lat_long(label, how = ' ') ⇒ Hash
rubocop:disable Metrics/MethodLength, Metrics/BlockNesting
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# File 'lib/utilities/geo.rb', line 197 def self.hunt_lat_long(label, how = ' ') if how.nil? pieces = [label] else pieces = label.split(how) end lat_long = {} pieces.each do |piece| # group of possible regex configurations # m = /(?<lat>\d+\.\d+\s*(?<ca>[NS])*)\s(?<long>\d+\.\d+\s*(?<co>[EW])*)/i =~ piece m = REGEXP_COORD[:dd1a][:reg].match(piece) if m.nil? piece.each_char do |c| next unless SPECIAL_LATLONG_SYMBOLS.include?(c) test = Utilities::Geo.degrees_minutes_seconds_to_decimal_degrees(piece) unless test.nil? if test.to_f.is_a? Numeric # might be a lat/long lat_long[:piece] = piece if lat_long[:lat].nil? lat_long[:lat] = piece else lat_long[:long] = piece lat_long[:piece] = [lat_long[:lat], piece].join(how) end end end break end else lat_long[:piece] = m[0] lat_long[:lat] = m[:lat] lat_long[:long] = m[:long] end end lat_long end |
.hunt_lat_long_full(label, filters = REGEXP_COORD.keys) ⇒ Array
Returns of possible coordinate strings.
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# File 'lib/utilities/geo.rb', line 176 def self.hunt_lat_long_full(label, filters = REGEXP_COORD.keys) trials = {} filters.each_with_index {|kee, _dex| kee_string = kee.to_s.upcase trials[kee_string] = {} named = REGEXP_COORD[kee][:reg].match(label) unless named.nil? trials[kee_string][:piece] = named[0] trials[kee_string][:lat] = named[:lat] trials[kee_string][:long] = named[:long] named end trials[kee_string][:method] = "text, #{kee_string}" } trials end |
.hunt_wrapper(label, filters = REGEXP_COORD.keys) ⇒ Array
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# File 'lib/utilities/geo.rb', line 239 def self.hunt_wrapper(label, filters = REGEXP_COORD.keys) trials = self.hunt_lat_long_full(label, filters) ';, '.each_char {|sep| trial = self.hunt_lat_long(label, sep) found = "#{trial[:piece]}" unless trial[:lat].nil? and !trial[:long].nil? _found = "(#{sep})" if found.blank? end trials["(#{sep})"] = trial.merge!(method: "(#{sep})") } trials end |
.is_lat_long_special(c) ⇒ Boolean
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# File 'lib/utilities/geo.rb', line 256 def self.is_lat_long_special(c) SPECIAL_LATLONG_SYMBOLS.include?(c) end |
.nearby_from_params(params) ⇒ Integer
rubocop:disable Metrics/MethodLength
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# File 'lib/utilities/geo.rb', line 359 def self.nearby_from_params(params) nearby_distance = params['nearby_distance'].to_i nearby_distance = CollectingEvent::NEARBY_DISTANCE if nearby_distance == 0 decade = case nearby_distance.to_s.length when 1..2 10 when 3 100 when 4 1_000 when 5 10_000 when 6 100_000 when 7 1_000_000 when 8 10_000_000 else 10 end digit = (nearby_distance.to_f / decade.to_f).round case digit when 0..1 digit = 1 when 2 digit = 2 when 3..5 digit = 5 when 6..10 decade *= 10 digit = 1 end params['digit1'] = digit.to_s params['digit2'] = decade.to_s digit * decade end |
.significant_digits(number_string) ⇒ Array
determine number of significant digits in string input argument
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# File 'lib/utilities/geo.rb', line 446 def self.significant_digits(number_string) # is there a decimal point? intg = '' decimal_point_zeros = '' mantissa = '' decimal_lead_zeros = 0 decimal_point = '' /(?<num>([0-9]*)(\.?)([0-9]*))/ =~ number_string if num.nil? raise end dp = num.index(".") if dp.nil? intg = num intgl = intg.sub(/^[0]+/,'') # strip lead zeros if intgl.nil? intg = num end intgt = intg.sub(/0+$/, '') # strip trailing zeros if intgt.nil? intg = intgl end # sig = intg.length else # make sure truly numeric decimal_point = '.' digits = num.split(".") if digits.length > 2 raise # or just ignore extra decimal point and beyond? else if digits[0].length > 0 # left of decimal ? intg = digits[0].sub(/^[0]+/,'') if intg.nil? intg = digits[0] end else intg = '' end mantissa = digits[1] unless digits[1].nil? if intg.length > 0 # have full case nn.mm sig = intg.length + mantissa.length else # mantissa might have "leading" zeros decimal_lead_zeros = digits[1].length mantissa = digits[1].sub(/^[0]+/, '') if mantissa.nil? mantissa = digits[1] end decimal_lead_zeros = decimal_lead_zeros - mantissa.length decimal_point_zeros = decimal_point_zeros.rjust(decimal_lead_zeros, '0') end else mantissa = '' end end end sig = intg + decimal_point + decimal_point_zeros + mantissa [sig, intg.length + mantissa.length, intg, decimal_point, decimal_point_zeros, mantissa] end |
Instance Method Details
#diamond_error_box ⇒ RGeo::Polygon
make a diamond 2 * radius tall and 2 * radius wide, with the reference point as center NOT TESTED/USED
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# File 'lib/utilities/geo.rb', line 427 def diamond_error_box p0 = geo_object delta_x = (error_radius / ONE_WEST) / Math.cos(p0.y * Math::PI / 180) delta_y = error_radius / ONE_NORTH retval = Gis::FACTORY.polygon(Gis::FACTORY.line_string( [Gis::FACTORY.point(p0.x, p0.y + delta_y), # north Gis::FACTORY.point(p0.x + delta_x, p0.y), # east Gis::FACTORY.point(p0.x, p0.y - delta_y), # south Gis::FACTORY.point(p0.x - delta_x, p0.y) # west ])) box = RGeo::Cartesian::BoundingBox.new(Gis::FACTORY) box.add(retval) box.to_geometry end |
#uni_string(char) ⇒ String
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# File 'lib/utilities/geo.rb', line 350 def uni_string(char) format('\\u%04X', char.ord) # "\\#{sprintf('u%04X', char.ord)}" # '\\u%04X' % [char.ord] end |