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(",")
163 prefix_name = t "geocoder.search_osm_nominatim.prefix.#{klass}.#{type}", :default => type.gsub("_", " ").capitalize
164 if klass == 'boundary' and type == 'administrative'
165 rank = (place.attributes["place_rank"].to_i + 1) / 2
166 prefix_name = t "geocoder.search_osm_nominatim.admin_levels.level#{rank}", :default => prefix_name
168 prefix = t "geocoder.search_osm_nominatim.prefix_format", :name => prefix_name
169 object_type = place.attributes["osm_type"]
170 object_id = place.attributes["osm_id"]
172 @results.push({:lat => lat, :lon => lon,
173 :min_lat => min_lat, :max_lat => max_lat,
174 :min_lon => min_lon, :max_lon => max_lon,
175 :prefix => prefix, :name => name,
176 :type => object_type, :id => object_id})
177 @more_params[:exclude].push(place.attributes["place_id"].to_s)
180 render :action => "results"
181 # rescue Exception => ex
182 # @error = "Error contacting nominatim.openstreetmap.org: #{ex.to_s}"
183 # render :action => "error"
187 # get query parameters
188 query = params[:query]
190 # create result array
194 response = fetch_xml("http://api.geonames.org/search?q=#{escape_query(query)}&maxRows=20&username=#{GEONAMES_USERNAME}")
197 response.elements.each("geonames/geoname") do |geoname|
198 lat = geoname.get_text("lat").to_s
199 lon = geoname.get_text("lng").to_s
200 name = geoname.get_text("name").to_s
201 country = geoname.get_text("countryName").to_s
202 @results.push({:lat => lat, :lon => lon,
203 :zoom => GEONAMES_ZOOM,
205 :suffix => ", #{country}"})
208 render :action => "results"
209 rescue Exception => ex
210 @error = "Error contacting ws.geonames.org: #{ex.to_s}"
211 render :action => "error"
214 def search_osm_nominatim_reverse
215 # get query parameters
220 # create result array
224 response = fetch_xml("#{NOMINATIM_URL}reverse?lat=#{lat}&lon=#{lon}&zoom=#{zoom}&accept-language=#{http_accept_language.user_preferred_languages.join(',')}")
227 response.elements.each("reversegeocode/result") do |result|
228 lat = result.attributes["lat"].to_s
229 lon = result.attributes["lon"].to_s
230 object_type = result.attributes["osm_type"]
231 object_id = result.attributes["osm_id"]
232 description = result.get_text.to_s
234 @results.push({:lat => lat, :lon => lon,
236 :name => description,
237 :type => object_type, :id => object_id})
240 render :action => "results"
241 rescue Exception => ex
242 @error = "Error contacting nominatim.openstreetmap.org: #{ex.to_s}"
243 render :action => "error"
246 def search_geonames_reverse
247 # get query parameters
251 # create result array
255 response = fetch_xml("http://ws.geonames.org/countrySubdivision?lat=#{lat}&lng=#{lon}")
258 response.elements.each("geonames/countrySubdivision") do |geoname|
259 name = geoname.get_text("adminName1").to_s
260 country = geoname.get_text("countryName").to_s
261 @results.push({:lat => lat, :lon => lon,
262 :zoom => GEONAMES_ZOOM,
264 :suffix => ", #{country}"})
267 render :action => "results"
268 rescue Exception => ex
269 @error = "Error contacting ws.geonames.org: #{ex.to_s}"
270 render :action => "error"
276 return Net::HTTP.get(URI.parse(url))
280 return REXML::Document.new(fetch_text(url))
283 def format_distance(distance)
284 return t("geocoder.distance", :count => distance)
287 def format_direction(bearing)
288 return t("geocoder.direction.south_west") if bearing >= 22.5 and bearing < 67.5
289 return t("geocoder.direction.south") if bearing >= 67.5 and bearing < 112.5
290 return t("geocoder.direction.south_east") if bearing >= 112.5 and bearing < 157.5
291 return t("geocoder.direction.east") if bearing >= 157.5 and bearing < 202.5
292 return t("geocoder.direction.north_east") if bearing >= 202.5 and bearing < 247.5
293 return t("geocoder.direction.north") if bearing >= 247.5 and bearing < 292.5
294 return t("geocoder.direction.north_west") if bearing >= 292.5 and bearing < 337.5
295 return t("geocoder.direction.west")
298 def format_name(name)
299 return name.gsub(/( *\[[^\]]*\])*$/, "")
302 def count_results(results)
305 results.each do |source|
306 count += source[:results].length if source[:results]
312 def escape_query(query)
313 return URI.escape(query, Regexp.new("[^#{URI::PATTERN::UNRESERVED}]", false, 'N'))
317 query = params[:query]
322 if latlon = query.match(/^([NS])\s*(\d{1,3}(\.\d*)?)\W*([EW])\s*(\d{1,3}(\.\d*)?)$/).try(:captures) # [NSEW] decimal degrees
323 params.merge!(nsew_to_decdeg(latlon)).delete(:query)
324 elsif latlon = query.match(/^(\d{1,3}(\.\d*)?)\s*([NS])\W*(\d{1,3}(\.\d*)?)\s*([EW])$/).try(:captures) # decimal degrees [NSEW]
325 params.merge!(nsew_to_decdeg(latlon)).delete(:query)
327 elsif latlon = query.match(/^([NS])\s*(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?\W*([EW])\s*(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?$/).try(:captures) # [NSEW] degrees, decimal minutes
328 params.merge!(ddm_to_decdeg(latlon)).delete(:query)
329 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])$/).try(:captures) # degrees, decimal minutes [NSEW]
330 params.merge!(ddm_to_decdeg(latlon)).delete(:query)
332 elsif latlon = query.match(/^([NS])\s*(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]?\W*([EW])\s*(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]?$/).try(:captures) # [NSEW] degrees, minutes, decimal seconds
333 params.merge!(dms_to_decdeg(latlon)).delete(:query)
334 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])$/).try(:captures) # degrees, minutes, decimal seconds [NSEW]
335 params.merge!(dms_to_decdeg(latlon)).delete(:query)
337 elsif latlon = query.match(/^\s*([+-]?\d+(\.\d*)?)\s*[\s,]\s*([+-]?\d+(\.\d*)?)\s*$/)
338 params.merge!({:lat => latlon[1].to_f, :lon => latlon[3].to_f}).delete(:query)
342 def nsew_to_decdeg(captures)
345 captures[2].downcase != 's' ? lat = captures[0].to_f : lat = -(captures[0].to_f)
346 captures[5].downcase != 'w' ? lon = captures[3].to_f : lon = -(captures[3].to_f)
348 captures[0].downcase != 's' ? lat = captures[1].to_f : lat = -(captures[1].to_f)
349 captures[3].downcase != 'w' ? lon = captures[4].to_f : lon = -(captures[4].to_f)
351 {:lat => lat, :lon => lon}
354 def ddm_to_decdeg(captures)
357 captures[3].downcase != 's' ? lat = captures[0].to_f + captures[1].to_f/60 : lat = -(captures[0].to_f + captures[1].to_f/60)
358 captures[7].downcase != 'w' ? lon = captures[4].to_f + captures[5].to_f/60 : lon = -(captures[4].to_f + captures[5].to_f/60)
360 captures[0].downcase != 's' ? lat = captures[1].to_f + captures[2].to_f/60 : lat = -(captures[1].to_f + captures[2].to_f/60)
361 captures[4].downcase != 'w' ? lon = captures[5].to_f + captures[6].to_f/60 : lon = -(captures[5].to_f + captures[6].to_f/60)
363 {:lat => lat, :lon => lon}
366 def dms_to_decdeg(captures)
369 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)
370 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)
372 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)
373 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)
375 {:lat => lat, :lon => lon}