3 class GeocoderController < ApplicationController
6 require "rexml/document"
8 before_action :authorize_web
9 before_action :set_locale
10 before_action :require_oauth, :only => [:search]
13 @params = normalize_params
16 if @params[:lat] && @params[:lon]
17 @sources.push "latlon"
18 @sources.push "osm_nominatim_reverse"
19 @sources.push "geonames_reverse" if defined?(GEONAMES_USERNAME)
21 if @params[:query] =~ /^\d{5}(-\d{4})?$/
22 @sources.push "us_postcode"
23 @sources.push "osm_nominatim"
24 elsif @params[:query] =~ /^(GIR 0AA|[A-PR-UWYZ]([0-9]{1,2}|([A-HK-Y][0-9]|[A-HK-Y][0-9]([0-9]|[ABEHMNPRV-Y]))|[0-9][A-HJKS-UW])\s*[0-9][ABD-HJLNP-UW-Z]{2})$/i
25 @sources.push "uk_postcode"
26 @sources.push "osm_nominatim"
27 elsif @params[:query] =~ /^[A-Z]\d[A-Z]\s*\d[A-Z]\d$/i
28 @sources.push "ca_postcode"
29 @sources.push "osm_nominatim"
31 @sources.push "osm_nominatim"
32 @sources.push "geonames" if defined?(GEONAMES_USERNAME)
39 render :layout => map_layout
44 lat = params[:lat].to_f
45 lon = params[:lon].to_f
46 if lat < -90 || lat > 90
47 @error = "Latitude #{lat} out of range"
48 render :action => "error"
49 elsif lon < -180 || lon > 180
50 @error = "Longitude #{lon} out of range"
51 render :action => "error"
53 @results = [{ :lat => lat, :lon => lon,
54 :zoom => params[:zoom],
55 :name => "#{lat}, #{lon}" }]
57 render :action => "results"
61 def search_us_postcode
62 # get query parameters
63 query = params[:query]
68 # ask geocoder.us (they have a non-commercial use api)
69 response = fetch_text("http://rpc.geocoder.us/service/csv?zip=#{escape_query(query)}")
72 unless response =~ /couldn't find this zip/
73 data = response.split(/\s*,\s+/) # lat,long,town,state,zip
74 @results.push(:lat => data[0], :lon => data[1],
75 :zoom => POSTCODE_ZOOM,
76 :prefix => "#{data[2]}, #{data[3]},",
80 render :action => "results"
81 rescue StandardError => ex
82 @error = "Error contacting rpc.geocoder.us: #{ex}"
83 render :action => "error"
86 def search_uk_postcode
87 # get query parameters
88 query = params[:query]
93 # ask npemap.org.uk to do a combined npemap + freethepostcode search
94 response = fetch_text("http://www.npemap.org.uk/cgi/geocoder.fcgi?format=text&postcode=#{escape_query(query)}")
97 unless response =~ /Error/
98 dataline = response.split(/\n/)[1]
99 data = dataline.split(/,/) # easting,northing,postcode,lat,long
100 postcode = data[2].delete("'")
101 zoom = POSTCODE_ZOOM - postcode.count("#")
102 @results.push(:lat => data[3], :lon => data[4], :zoom => zoom,
106 render :action => "results"
107 rescue StandardError => ex
108 @error = "Error contacting www.npemap.org.uk: #{ex}"
109 render :action => "error"
112 def search_ca_postcode
113 # get query parameters
114 query = params[:query]
117 # ask geocoder.ca (note - they have a per-day limit)
118 response = fetch_xml("http://geocoder.ca/?geoit=XML&postal=#{escape_query(query)}")
121 if response.get_elements("geodata/error").empty?
122 @results.push(:lat => response.get_text("geodata/latt").to_s,
123 :lon => response.get_text("geodata/longt").to_s,
124 :zoom => POSTCODE_ZOOM,
125 :name => query.upcase)
128 render :action => "results"
129 rescue StandardError => ex
130 @error = "Error contacting geocoder.ca: #{ex}"
131 render :action => "error"
134 def search_osm_nominatim
135 # get query parameters
136 query = params[:query]
137 minlon = params[:minlon]
138 minlat = params[:minlat]
139 maxlon = params[:maxlon]
140 maxlat = params[:maxlat]
143 if minlon && minlat && maxlon && maxlat
144 viewbox = "&viewbox=#{minlon},#{maxlat},#{maxlon},#{minlat}"
147 # get objects to excude
148 exclude = "&exclude_place_ids=#{params[:exclude]}" if params[:exclude]
151 response = fetch_xml("http:#{NOMINATIM_URL}search?format=xml&extratags=1&q=#{escape_query(query)}#{viewbox}#{exclude}&accept-language=#{http_accept_language.user_preferred_languages.join(',')}")
153 # extract the results from the response
154 results = response.elements["searchresults"]
156 # extract parameters from more_url
157 more_url_params = CGI.parse(URI.parse(results.attributes["more_url"]).query)
159 # create result array
162 # create parameter hash for "more results" link
163 @more_params = params
164 .permit(:query, :minlon, :minlat, :maxlon, :maxlat, :exclude)
165 .merge(:exclude => more_url_params["exclude_place_ids"].first)
168 results.elements.each("place") do |place|
169 lat = place.attributes["lat"].to_s
170 lon = place.attributes["lon"].to_s
171 klass = place.attributes["class"].to_s
172 type = place.attributes["type"].to_s
173 name = place.attributes["display_name"].to_s
174 min_lat, max_lat, min_lon, max_lon = place.attributes["boundingbox"].to_s.split(",")
175 prefix_name = if type.empty?
178 t "geocoder.search_osm_nominatim.prefix.#{klass}.#{type}", :default => type.tr("_", " ").capitalize
180 if klass == "boundary" && type == "administrative"
181 rank = (place.attributes["place_rank"].to_i + 1) / 2
182 prefix_name = t "geocoder.search_osm_nominatim.admin_levels.level#{rank}", :default => prefix_name
183 place.elements["extratags"].elements.each("tag") do |extratag|
184 if extratag.attributes["key"] == "place"
185 prefix_name = t "geocoder.search_osm_nominatim.prefix.place.#{extratag.attributes['value']}", :default => prefix_name
189 prefix = t "geocoder.search_osm_nominatim.prefix_format", :name => prefix_name
190 object_type = place.attributes["osm_type"]
191 object_id = place.attributes["osm_id"]
193 @results.push(:lat => lat, :lon => lon,
194 :min_lat => min_lat, :max_lat => max_lat,
195 :min_lon => min_lon, :max_lon => max_lon,
196 :prefix => prefix, :name => name,
197 :type => object_type, :id => object_id)
200 render :action => "results"
201 rescue StandardError => ex
202 @error = "Error contacting nominatim.openstreetmap.org: #{ex}"
203 render :action => "error"
207 # get query parameters
208 query = params[:query]
210 # get preferred language
211 lang = I18n.locale.to_s.split("-").first
213 # create result array
217 response = fetch_xml("http://api.geonames.org/search?q=#{escape_query(query)}&lang=#{lang}&maxRows=20&username=#{GEONAMES_USERNAME}")
220 response.elements.each("geonames/geoname") do |geoname|
221 lat = geoname.get_text("lat").to_s
222 lon = geoname.get_text("lng").to_s
223 name = geoname.get_text("name").to_s
224 country = geoname.get_text("countryName").to_s
225 @results.push(:lat => lat, :lon => lon,
226 :zoom => GEONAMES_ZOOM,
228 :suffix => ", #{country}")
231 render :action => "results"
232 rescue StandardError => ex
233 @error = "Error contacting api.geonames.org: #{ex}"
234 render :action => "error"
237 def search_osm_nominatim_reverse
238 # get query parameters
243 # create result array
247 response = fetch_xml("http:#{NOMINATIM_URL}reverse?lat=#{lat}&lon=#{lon}&zoom=#{zoom}&accept-language=#{http_accept_language.user_preferred_languages.join(',')}")
250 response.elements.each("reversegeocode/result") do |result|
251 lat = result.attributes["lat"].to_s
252 lon = result.attributes["lon"].to_s
253 object_type = result.attributes["osm_type"]
254 object_id = result.attributes["osm_id"]
255 description = result.get_text.to_s
257 @results.push(:lat => lat, :lon => lon,
259 :name => description,
260 :type => object_type, :id => object_id)
263 render :action => "results"
264 rescue StandardError => ex
265 @error = "Error contacting nominatim.openstreetmap.org: #{ex}"
266 render :action => "error"
269 def search_geonames_reverse
270 # get query parameters
274 # get preferred language
275 lang = I18n.locale.to_s.split("-").first
277 # create result array
281 response = fetch_xml("http://api.geonames.org/countrySubdivision?lat=#{lat}&lng=#{lon}&lang=#{lang}&username=#{GEONAMES_USERNAME}")
284 response.elements.each("geonames/countrySubdivision") do |geoname|
285 name = geoname.get_text("adminName1").to_s
286 country = geoname.get_text("countryName").to_s
287 @results.push(:lat => lat, :lon => lon,
288 :zoom => GEONAMES_ZOOM,
290 :suffix => ", #{country}")
293 render :action => "results"
294 rescue StandardError => ex
295 @error = "Error contacting api.geonames.org: #{ex}"
296 render :action => "error"
302 response = OSM.http_client.get(URI.parse(url))
307 raise response.status.to_s
312 REXML::Document.new(fetch_text(url))
315 def escape_query(query)
316 URI.escape(query, Regexp.new("[^#{URI::PATTERN::UNRESERVED}]", false, "N"))
320 if query = params[:query]
323 if latlon = query.match(/^([NS])\s*(\d{1,3}(\.\d*)?)\W*([EW])\s*(\d{1,3}(\.\d*)?)$/).try(:captures) # [NSEW] decimal degrees
324 params.merge!(nsew_to_decdeg(latlon)).delete(:query)
325 elsif latlon = query.match(/^(\d{1,3}(\.\d*)?)\s*([NS])\W*(\d{1,3}(\.\d*)?)\s*([EW])$/).try(:captures) # decimal degrees [NSEW]
326 params.merge!(nsew_to_decdeg(latlon)).delete(:query)
328 elsif latlon = query.match(/^([NS])\s*(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?\W*([EW])\s*(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?$/).try(:captures) # [NSEW] degrees, decimal minutes
329 params.merge!(ddm_to_decdeg(latlon)).delete(:query)
330 elsif latlon = query.match(/^(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?\s*([NS])\W*(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?\s*([EW])$/).try(:captures) # degrees, decimal minutes [NSEW]
331 params.merge!(ddm_to_decdeg(latlon)).delete(:query)
333 elsif latlon = query.match(/^([NS])\s*(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]?\W*([EW])\s*(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]?$/).try(:captures) # [NSEW] degrees, minutes, decimal seconds
334 params.merge!(dms_to_decdeg(latlon)).delete(:query)
335 elsif latlon = query.match(/^(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]\s*([NS])\W*(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]?\s*([EW])$/).try(:captures) # degrees, minutes, decimal seconds [NSEW]
336 params.merge!(dms_to_decdeg(latlon)).delete(:query)
338 elsif latlon = query.match(/^\s*([+-]?\d+(\.\d*)?)\s*[\s,]\s*([+-]?\d+(\.\d*)?)\s*$/)
339 params.merge!(:lat => latlon[1].to_f, :lon => latlon[3].to_f).delete(:query)
343 params.permit(:query, :lat, :lon, :zoom, :minlat, :minlon, :maxlat, :maxlon)
346 def nsew_to_decdeg(captures)
349 lat = !captures[2].casecmp("s").zero? ? captures[0].to_f : -captures[0].to_f
350 lon = !captures[5].casecmp("w").zero? ? captures[3].to_f : -captures[3].to_f
352 lat = !captures[0].casecmp("s").zero? ? captures[1].to_f : -captures[1].to_f
353 lon = !captures[3].casecmp("w").zero? ? captures[4].to_f : -captures[4].to_f
355 { :lat => lat, :lon => lon }
358 def ddm_to_decdeg(captures)
361 lat = !captures[3].casecmp("s").zero? ? captures[0].to_f + captures[1].to_f / 60 : -(captures[0].to_f + captures[1].to_f / 60)
362 lon = !captures[7].casecmp("w").zero? ? captures[4].to_f + captures[5].to_f / 60 : -(captures[4].to_f + captures[5].to_f / 60)
364 lat = !captures[0].casecmp("s").zero? ? captures[1].to_f + captures[2].to_f / 60 : -(captures[1].to_f + captures[2].to_f / 60)
365 lon = !captures[4].casecmp("w").zero? ? captures[5].to_f + captures[6].to_f / 60 : -(captures[5].to_f + captures[6].to_f / 60)
367 { :lat => lat, :lon => lon }
370 def dms_to_decdeg(captures)
373 lat = !captures[4].casecmp("s").zero? ? captures[0].to_f + (captures[1].to_f + captures[2].to_f / 60) / 60 : -(captures[0].to_f + (captures[1].to_f + captures[2].to_f / 60) / 60)
374 lon = !captures[9].casecmp("w").zero? ? captures[5].to_f + (captures[6].to_f + captures[7].to_f / 60) / 60 : -(captures[5].to_f + (captures[6].to_f + captures[7].to_f / 60) / 60)
376 lat = !captures[0].casecmp("s").zero? ? captures[1].to_f + (captures[2].to_f + captures[3].to_f / 60) / 60 : -(captures[1].to_f + (captures[2].to_f + captures[3].to_f / 60) / 60)
377 lon = !captures[5].casecmp("w").zero? ? captures[6].to_f + (captures[7].to_f + captures[8].to_f / 60) / 60 : -(captures[6].to_f + (captures[7].to_f + captures[8].to_f / 60) / 60)
379 { :lat => lat, :lon => lon }