3 class GeocoderController < ApplicationController
6 require 'rexml/document'
8 before_filter :authorize_web
9 before_filter :set_locale
15 if params[:lat] && params[:lon]
16 @sources.push "latlon"
17 @sources.push "osm_nominatim_reverse"
18 @sources.push "geonames_reverse"
19 elsif params[:query].match(/^\d{5}(-\d{4})?$/)
20 @sources.push "us_postcode"
21 @sources.push "osm_nominatim"
22 elsif params[:query].match(/^(GIR 0AA|[A-PR-UWYZ]([0-9]{1,2}|([A-HK-Y][0-9]|[A-HK-Y][0-9]([0-9]|[ABEHMNPRV-Y]))|[0-9][A-HJKS-UW])\s*[0-9][ABD-HJLNP-UW-Z]{2})$/i)
23 @sources.push "uk_postcode"
24 @sources.push "osm_nominatim"
25 elsif params[:query].match(/^[A-Z]\d[A-Z]\s*\d[A-Z]\d$/i)
26 @sources.push "ca_postcode"
27 @sources.push "osm_nominatim"
29 @sources.push "osm_nominatim"
30 @sources.push "geonames" if defined?(GEONAMES_USERNAME)
33 render :layout => map_layout
37 lat = params[:lat].to_f
38 lon = params[:lon].to_f
39 if lat < -90 or lat > 90
40 @error = "Latitude #{lat} out of range"
41 render :action => "error"
42 elsif lon < -180 or lon > 180
43 @error = "Longitude #{lon} out of range"
44 render :action => "error"
46 @results = [{:lat => lat, :lon => lon,
47 :zoom => params[:zoom],
48 :name => "#{lat}, #{lon}"}]
50 render :action => "results"
54 def search_us_postcode
55 # get query parameters
56 query = params[:query]
61 # ask geocoder.us (they have a non-commercial use api)
62 response = fetch_text("http://rpc.geocoder.us/service/csv?zip=#{escape_query(query)}")
65 unless response.match(/couldn't find this zip/)
66 data = response.split(/\s*,\s+/) # lat,long,town,state,zip
67 @results.push({:lat => data[0], :lon => data[1],
68 :zoom => POSTCODE_ZOOM,
69 :prefix => "#{data[2]}, #{data[3]},",
73 render :action => "results"
74 rescue Exception => ex
75 @error = "Error contacting rpc.geocoder.us: #{ex.to_s}"
76 render :action => "error"
79 def search_uk_postcode
80 # get query parameters
81 query = params[:query]
86 # ask npemap.org.uk to do a combined npemap + freethepostcode search
87 response = fetch_text("http://www.npemap.org.uk/cgi/geocoder.fcgi?format=text&postcode=#{escape_query(query)}")
90 unless response.match(/Error/)
91 dataline = response.split(/\n/)[1]
92 data = dataline.split(/,/) # easting,northing,postcode,lat,long
93 postcode = data[2].gsub(/'/, "")
94 zoom = POSTCODE_ZOOM - postcode.count("#")
95 @results.push({:lat => data[3], :lon => data[4], :zoom => zoom,
99 render :action => "results"
100 rescue Exception => ex
101 @error = "Error contacting www.npemap.org.uk: #{ex.to_s}"
102 render :action => "error"
105 def search_ca_postcode
106 # get query parameters
107 query = params[:query]
110 # ask geocoder.ca (note - they have a per-day limit)
111 response = fetch_xml("http://geocoder.ca/?geoit=XML&postal=#{escape_query(query)}")
114 if response.get_elements("geodata/error").empty?
115 @results.push({:lat => response.get_text("geodata/latt").to_s,
116 :lon => response.get_text("geodata/longt").to_s,
117 :zoom => POSTCODE_ZOOM,
118 :name => query.upcase})
121 render :action => "results"
122 rescue Exception => ex
123 @error = "Error contacting geocoder.ca: #{ex.to_s}"
124 render :action => "error"
127 def search_osm_nominatim
128 # get query parameters
129 query = params[:query]
130 minlon = params[:minlon]
131 minlat = params[:minlat]
132 maxlon = params[:maxlon]
133 maxlat = params[:maxlat]
136 if minlon && minlat && maxlon && maxlat
137 viewbox = "&viewbox=#{minlon},#{maxlat},#{maxlon},#{minlat}"
140 # get objects to excude
142 exclude = "&exclude_place_ids=#{params[:exclude].join(',')}"
146 response = fetch_xml("#{NOMINATIM_URL}search?format=xml&q=#{escape_query(query)}#{viewbox}#{exclude}&accept-language=#{http_accept_language.user_preferred_languages.join(',')}")
148 # create result array
151 # create parameter hash for "more results" link
152 @more_params = params.reverse_merge({ :exclude => [] })
154 # extract the results from the response
155 results = response.elements["searchresults"]
158 results.elements.each("place") do |place|
159 lat = place.attributes["lat"].to_s
160 lon = place.attributes["lon"].to_s
161 klass = place.attributes["class"].to_s
162 type = place.attributes["type"].to_s
163 name = place.attributes["display_name"].to_s
164 min_lat,max_lat,min_lon,max_lon = place.attributes["boundingbox"].to_s.split(",")
168 prefix_name = t "geocoder.search_osm_nominatim.prefix.#{klass}.#{type}", :default => type.gsub("_", " ").capitalize
170 if klass == 'boundary' and type == 'administrative'
171 rank = (place.attributes["place_rank"].to_i + 1) / 2
172 prefix_name = t "geocoder.search_osm_nominatim.admin_levels.level#{rank}", :default => prefix_name
174 prefix = t "geocoder.search_osm_nominatim.prefix_format", :name => prefix_name
175 object_type = place.attributes["osm_type"]
176 object_id = place.attributes["osm_id"]
178 @results.push({:lat => lat, :lon => lon,
179 :min_lat => min_lat, :max_lat => max_lat,
180 :min_lon => min_lon, :max_lon => max_lon,
181 :prefix => prefix, :name => name,
182 :type => object_type, :id => object_id})
183 @more_params[:exclude].push(place.attributes["place_id"].to_s)
186 render :action => "results"
187 # rescue Exception => ex
188 # @error = "Error contacting nominatim.openstreetmap.org: #{ex.to_s}"
189 # render :action => "error"
193 # get query parameters
194 query = params[:query]
196 # create result array
200 response = fetch_xml("http://api.geonames.org/search?q=#{escape_query(query)}&maxRows=20&username=#{GEONAMES_USERNAME}")
203 response.elements.each("geonames/geoname") do |geoname|
204 lat = geoname.get_text("lat").to_s
205 lon = geoname.get_text("lng").to_s
206 name = geoname.get_text("name").to_s
207 country = geoname.get_text("countryName").to_s
208 @results.push({:lat => lat, :lon => lon,
209 :zoom => GEONAMES_ZOOM,
211 :suffix => ", #{country}"})
214 render :action => "results"
215 rescue Exception => ex
216 @error = "Error contacting ws.geonames.org: #{ex.to_s}"
217 render :action => "error"
220 def search_osm_nominatim_reverse
221 # get query parameters
226 # create result array
230 response = fetch_xml("#{NOMINATIM_URL}reverse?lat=#{lat}&lon=#{lon}&zoom=#{zoom}&accept-language=#{http_accept_language.user_preferred_languages.join(',')}")
233 response.elements.each("reversegeocode/result") do |result|
234 lat = result.attributes["lat"].to_s
235 lon = result.attributes["lon"].to_s
236 object_type = result.attributes["osm_type"]
237 object_id = result.attributes["osm_id"]
238 description = result.get_text.to_s
240 @results.push({:lat => lat, :lon => lon,
242 :name => description,
243 :type => object_type, :id => object_id})
246 render :action => "results"
247 rescue Exception => ex
248 @error = "Error contacting nominatim.openstreetmap.org: #{ex.to_s}"
249 render :action => "error"
252 def search_geonames_reverse
253 # get query parameters
257 # create result array
261 response = fetch_xml("http://ws.geonames.org/countrySubdivision?lat=#{lat}&lng=#{lon}")
264 response.elements.each("geonames/countrySubdivision") do |geoname|
265 name = geoname.get_text("adminName1").to_s
266 country = geoname.get_text("countryName").to_s
267 @results.push({:lat => lat, :lon => lon,
268 :zoom => GEONAMES_ZOOM,
270 :suffix => ", #{country}"})
273 render :action => "results"
274 rescue Exception => ex
275 @error = "Error contacting ws.geonames.org: #{ex.to_s}"
276 render :action => "error"
282 return Net::HTTP.get(URI.parse(url))
286 return REXML::Document.new(fetch_text(url))
289 def format_distance(distance)
290 return t("geocoder.distance", :count => distance)
293 def format_direction(bearing)
294 return t("geocoder.direction.south_west") if bearing >= 22.5 and bearing < 67.5
295 return t("geocoder.direction.south") if bearing >= 67.5 and bearing < 112.5
296 return t("geocoder.direction.south_east") if bearing >= 112.5 and bearing < 157.5
297 return t("geocoder.direction.east") if bearing >= 157.5 and bearing < 202.5
298 return t("geocoder.direction.north_east") if bearing >= 202.5 and bearing < 247.5
299 return t("geocoder.direction.north") if bearing >= 247.5 and bearing < 292.5
300 return t("geocoder.direction.north_west") if bearing >= 292.5 and bearing < 337.5
301 return t("geocoder.direction.west")
304 def format_name(name)
305 return name.gsub(/( *\[[^\]]*\])*$/, "")
308 def count_results(results)
311 results.each do |source|
312 count += source[:results].length if source[:results]
318 def escape_query(query)
319 return URI.escape(query, Regexp.new("[^#{URI::PATTERN::UNRESERVED}]", false, 'N'))
323 query = params[:query]
328 if latlon = query.match(/^([NS])\s*(\d{1,3}(\.\d*)?)\W*([EW])\s*(\d{1,3}(\.\d*)?)$/).try(:captures) # [NSEW] decimal degrees
329 params.merge!(nsew_to_decdeg(latlon)).delete(:query)
330 elsif latlon = query.match(/^(\d{1,3}(\.\d*)?)\s*([NS])\W*(\d{1,3}(\.\d*)?)\s*([EW])$/).try(:captures) # decimal degrees [NSEW]
331 params.merge!(nsew_to_decdeg(latlon)).delete(:query)
333 elsif latlon = query.match(/^([NS])\s*(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?\W*([EW])\s*(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?$/).try(:captures) # [NSEW] degrees, decimal minutes
334 params.merge!(ddm_to_decdeg(latlon)).delete(:query)
335 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])$/).try(:captures) # degrees, decimal minutes [NSEW]
336 params.merge!(ddm_to_decdeg(latlon)).delete(:query)
338 elsif latlon = query.match(/^([NS])\s*(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]?\W*([EW])\s*(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]?$/).try(:captures) # [NSEW] degrees, minutes, decimal seconds
339 params.merge!(dms_to_decdeg(latlon)).delete(:query)
340 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])$/).try(:captures) # degrees, minutes, decimal seconds [NSEW]
341 params.merge!(dms_to_decdeg(latlon)).delete(:query)
343 elsif latlon = query.match(/^\s*([+-]?\d+(\.\d*)?)\s*[\s,]\s*([+-]?\d+(\.\d*)?)\s*$/)
344 params.merge!({:lat => latlon[1].to_f, :lon => latlon[3].to_f}).delete(:query)
348 def nsew_to_decdeg(captures)
351 captures[2].downcase != 's' ? lat = captures[0].to_f : lat = -(captures[0].to_f)
352 captures[5].downcase != 'w' ? lon = captures[3].to_f : lon = -(captures[3].to_f)
354 captures[0].downcase != 's' ? lat = captures[1].to_f : lat = -(captures[1].to_f)
355 captures[3].downcase != 'w' ? lon = captures[4].to_f : lon = -(captures[4].to_f)
357 {:lat => lat, :lon => lon}
360 def ddm_to_decdeg(captures)
363 captures[3].downcase != 's' ? lat = captures[0].to_f + captures[1].to_f/60 : lat = -(captures[0].to_f + captures[1].to_f/60)
364 captures[7].downcase != 'w' ? lon = captures[4].to_f + captures[5].to_f/60 : lon = -(captures[4].to_f + captures[5].to_f/60)
366 captures[0].downcase != 's' ? lat = captures[1].to_f + captures[2].to_f/60 : lat = -(captures[1].to_f + captures[2].to_f/60)
367 captures[4].downcase != 'w' ? lon = captures[5].to_f + captures[6].to_f/60 : lon = -(captures[5].to_f + captures[6].to_f/60)
369 {:lat => lat, :lon => lon}
372 def dms_to_decdeg(captures)
375 captures[4].downcase != 's' ? lat = captures[0].to_f + (captures[1].to_f + captures[2].to_f/60)/60 : lat = -(captures[0].to_f + (captures[1].to_f + captures[2].to_f/60)/60)
376 captures[9].downcase != 'w' ? lon = captures[5].to_f + (captures[6].to_f + captures[7].to_f/60)/60 : lon = -(captures[5].to_f + (captures[6].to_f + captures[7].to_f/60)/60)
378 captures[0].downcase != 's' ? lat = captures[1].to_f + (captures[2].to_f + captures[3].to_f/60)/60 : lat = -(captures[1].to_f + (captures[2].to_f + captures[3].to_f/60)/60)
379 captures[5].downcase != 'w' ? lon = captures[6].to_f + (captures[7].to_f + captures[8].to_f/60)/60 : lon = -(captures[6].to_f + (captures[7].to_f + captures[8].to_f/60)/60)
381 {:lat => lat, :lon => lon}