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)
35 lat = params[:lat].to_f
36 lon = params[:lon].to_f
37 if lat < -90 or lat > 90
38 @error = "Latitude #{lat} out of range"
39 render :action => "error"
40 elsif lon < -180 or lon > 180
41 @error = "Longitude #{lon} out of range"
42 render :action => "error"
44 @results = [{:lat => lat, :lon => lon,
45 :zoom => params[:zoom],
46 :name => "#{lat}, #{lon}"}]
48 render :action => "results"
52 def search_us_postcode
53 # get query parameters
54 query = params[:query]
59 # ask geocoder.us (they have a non-commercial use api)
60 response = fetch_text("http://rpc.geocoder.us/service/csv?zip=#{escape_query(query)}")
63 unless response.match(/couldn't find this zip/)
64 data = response.split(/\s*,\s+/) # lat,long,town,state,zip
65 @results.push({:lat => data[0], :lon => data[1],
66 :zoom => POSTCODE_ZOOM,
67 :prefix => "#{data[2]}, #{data[3]},",
71 render :action => "results"
72 rescue Exception => ex
73 @error = "Error contacting rpc.geocoder.us: #{ex.to_s}"
74 render :action => "error"
77 def search_uk_postcode
78 # get query parameters
79 query = params[:query]
84 # ask npemap.org.uk to do a combined npemap + freethepostcode search
85 response = fetch_text("http://www.npemap.org.uk/cgi/geocoder.fcgi?format=text&postcode=#{escape_query(query)}")
88 unless response.match(/Error/)
89 dataline = response.split(/\n/)[1]
90 data = dataline.split(/,/) # easting,northing,postcode,lat,long
91 postcode = data[2].gsub(/'/, "")
92 zoom = POSTCODE_ZOOM - postcode.count("#")
93 @results.push({:lat => data[3], :lon => data[4], :zoom => zoom,
97 render :action => "results"
98 rescue Exception => ex
99 @error = "Error contacting www.npemap.org.uk: #{ex.to_s}"
100 render :action => "error"
103 def search_ca_postcode
104 # get query parameters
105 query = params[:query]
108 # ask geocoder.ca (note - they have a per-day limit)
109 response = fetch_xml("http://geocoder.ca/?geoit=XML&postal=#{escape_query(query)}")
112 if response.get_elements("geodata/error").empty?
113 @results.push({:lat => response.get_text("geodata/latt").to_s,
114 :lon => response.get_text("geodata/longt").to_s,
115 :zoom => POSTCODE_ZOOM,
116 :name => query.upcase})
119 render :action => "results"
120 rescue Exception => ex
121 @error = "Error contacting geocoder.ca: #{ex.to_s}"
122 render :action => "error"
125 def search_osm_nominatim
126 # get query parameters
127 query = params[:query]
128 minlon = params[:minlon]
129 minlat = params[:minlat]
130 maxlon = params[:maxlon]
131 maxlat = params[:maxlat]
134 if minlon && minlat && maxlon && maxlat
135 viewbox = "&viewbox=#{minlon},#{maxlat},#{maxlon},#{minlat}"
138 # get objects to excude
140 exclude = "&exclude_place_ids=#{params[:exclude].join(',')}"
144 response = fetch_xml("#{NOMINATIM_URL}search?format=xml&q=#{escape_query(query)}#{viewbox}#{exclude}&accept-language=#{http_accept_language.user_preferred_languages.join(',')}")
146 # create result array
149 # create parameter hash for "more results" link
150 @more_params = params.reverse_merge({ :exclude => [] })
152 # extract the results from the response
153 results = response.elements["searchresults"]
156 results.elements.each("place") do |place|
157 lat = place.attributes["lat"].to_s
158 lon = place.attributes["lon"].to_s
159 klass = place.attributes["class"].to_s
160 type = place.attributes["type"].to_s
161 name = place.attributes["display_name"].to_s
162 min_lat,max_lat,min_lon,max_lon = place.attributes["boundingbox"].to_s.split(",")
166 prefix_name = t "geocoder.search_osm_nominatim.prefix.#{klass}.#{type}", :default => type.gsub("_", " ").capitalize
168 if klass == 'boundary' and type == 'administrative'
169 rank = (place.attributes["place_rank"].to_i + 1) / 2
170 prefix_name = t "geocoder.search_osm_nominatim.admin_levels.level#{rank}", :default => prefix_name
172 prefix = t "geocoder.search_osm_nominatim.prefix_format", :name => prefix_name
173 object_type = place.attributes["osm_type"]
174 object_id = place.attributes["osm_id"]
176 @results.push({:lat => lat, :lon => lon,
177 :min_lat => min_lat, :max_lat => max_lat,
178 :min_lon => min_lon, :max_lon => max_lon,
179 :prefix => prefix, :name => name,
180 :type => object_type, :id => object_id})
181 @more_params[:exclude].push(place.attributes["place_id"].to_s)
184 render :action => "results"
185 # rescue Exception => ex
186 # @error = "Error contacting nominatim.openstreetmap.org: #{ex.to_s}"
187 # render :action => "error"
191 # get query parameters
192 query = params[:query]
194 # create result array
198 response = fetch_xml("http://api.geonames.org/search?q=#{escape_query(query)}&maxRows=20&username=#{GEONAMES_USERNAME}")
201 response.elements.each("geonames/geoname") do |geoname|
202 lat = geoname.get_text("lat").to_s
203 lon = geoname.get_text("lng").to_s
204 name = geoname.get_text("name").to_s
205 country = geoname.get_text("countryName").to_s
206 @results.push({:lat => lat, :lon => lon,
207 :zoom => GEONAMES_ZOOM,
209 :suffix => ", #{country}"})
212 render :action => "results"
213 rescue Exception => ex
214 @error = "Error contacting ws.geonames.org: #{ex.to_s}"
215 render :action => "error"
218 def search_osm_nominatim_reverse
219 # get query parameters
224 # create result array
228 response = fetch_xml("#{NOMINATIM_URL}reverse?lat=#{lat}&lon=#{lon}&zoom=#{zoom}&accept-language=#{http_accept_language.user_preferred_languages.join(',')}")
231 response.elements.each("reversegeocode/result") do |result|
232 lat = result.attributes["lat"].to_s
233 lon = result.attributes["lon"].to_s
234 object_type = result.attributes["osm_type"]
235 object_id = result.attributes["osm_id"]
236 description = result.get_text.to_s
238 @results.push({:lat => lat, :lon => lon,
240 :name => description,
241 :type => object_type, :id => object_id})
244 render :action => "results"
245 rescue Exception => ex
246 @error = "Error contacting nominatim.openstreetmap.org: #{ex.to_s}"
247 render :action => "error"
250 def search_geonames_reverse
251 # get query parameters
255 # create result array
259 response = fetch_xml("http://ws.geonames.org/countrySubdivision?lat=#{lat}&lng=#{lon}")
262 response.elements.each("geonames/countrySubdivision") do |geoname|
263 name = geoname.get_text("adminName1").to_s
264 country = geoname.get_text("countryName").to_s
265 @results.push({:lat => lat, :lon => lon,
266 :zoom => GEONAMES_ZOOM,
268 :suffix => ", #{country}"})
271 render :action => "results"
272 rescue Exception => ex
273 @error = "Error contacting ws.geonames.org: #{ex.to_s}"
274 render :action => "error"
280 return Net::HTTP.get(URI.parse(url))
284 return REXML::Document.new(fetch_text(url))
287 def format_distance(distance)
288 return t("geocoder.distance", :count => distance)
291 def format_direction(bearing)
292 return t("geocoder.direction.south_west") if bearing >= 22.5 and bearing < 67.5
293 return t("geocoder.direction.south") if bearing >= 67.5 and bearing < 112.5
294 return t("geocoder.direction.south_east") if bearing >= 112.5 and bearing < 157.5
295 return t("geocoder.direction.east") if bearing >= 157.5 and bearing < 202.5
296 return t("geocoder.direction.north_east") if bearing >= 202.5 and bearing < 247.5
297 return t("geocoder.direction.north") if bearing >= 247.5 and bearing < 292.5
298 return t("geocoder.direction.north_west") if bearing >= 292.5 and bearing < 337.5
299 return t("geocoder.direction.west")
302 def format_name(name)
303 return name.gsub(/( *\[[^\]]*\])*$/, "")
306 def count_results(results)
309 results.each do |source|
310 count += source[:results].length if source[:results]
316 def escape_query(query)
317 return URI.escape(query, Regexp.new("[^#{URI::PATTERN::UNRESERVED}]", false, 'N'))
321 query = params[:query]
326 if latlon = query.match(/^([NS])\s*(\d{1,3}(\.\d*)?)\W*([EW])\s*(\d{1,3}(\.\d*)?)$/).try(:captures) # [NSEW] decimal degrees
327 params.merge!(nsew_to_decdeg(latlon)).delete(:query)
328 elsif latlon = query.match(/^(\d{1,3}(\.\d*)?)\s*([NS])\W*(\d{1,3}(\.\d*)?)\s*([EW])$/).try(:captures) # decimal degrees [NSEW]
329 params.merge!(nsew_to_decdeg(latlon)).delete(:query)
331 elsif latlon = query.match(/^([NS])\s*(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?\W*([EW])\s*(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?$/).try(:captures) # [NSEW] degrees, decimal minutes
332 params.merge!(ddm_to_decdeg(latlon)).delete(:query)
333 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])$/).try(:captures) # degrees, decimal minutes [NSEW]
334 params.merge!(ddm_to_decdeg(latlon)).delete(:query)
336 elsif latlon = query.match(/^([NS])\s*(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]?\W*([EW])\s*(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]?$/).try(:captures) # [NSEW] degrees, minutes, decimal seconds
337 params.merge!(dms_to_decdeg(latlon)).delete(:query)
338 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])$/).try(:captures) # degrees, minutes, decimal seconds [NSEW]
339 params.merge!(dms_to_decdeg(latlon)).delete(:query)
341 elsif latlon = query.match(/^\s*([+-]?\d+(\.\d*)?)\s*[\s,]\s*([+-]?\d+(\.\d*)?)\s*$/)
342 params.merge!({:lat => latlon[1].to_f, :lon => latlon[3].to_f}).delete(:query)
346 def nsew_to_decdeg(captures)
349 captures[2].downcase != 's' ? lat = captures[0].to_f : lat = -(captures[0].to_f)
350 captures[5].downcase != 'w' ? lon = captures[3].to_f : lon = -(captures[3].to_f)
352 captures[0].downcase != 's' ? lat = captures[1].to_f : lat = -(captures[1].to_f)
353 captures[3].downcase != 'w' ? lon = captures[4].to_f : lon = -(captures[4].to_f)
355 {:lat => lat, :lon => lon}
358 def ddm_to_decdeg(captures)
361 captures[3].downcase != 's' ? lat = captures[0].to_f + captures[1].to_f/60 : lat = -(captures[0].to_f + captures[1].to_f/60)
362 captures[7].downcase != 'w' ? lon = captures[4].to_f + captures[5].to_f/60 : lon = -(captures[4].to_f + captures[5].to_f/60)
364 captures[0].downcase != 's' ? lat = captures[1].to_f + captures[2].to_f/60 : lat = -(captures[1].to_f + captures[2].to_f/60)
365 captures[4].downcase != 'w' ? lon = captures[5].to_f + captures[6].to_f/60 : lon = -(captures[5].to_f + captures[6].to_f/60)
367 {:lat => lat, :lon => lon}
370 def dms_to_decdeg(captures)
373 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)
374 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)
376 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)
377 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)
379 {:lat => lat, :lon => lon}