1 class GeocoderController < ApplicationController
4 require 'rexml/document'
6 before_filter :set_locale
9 @query = params[:query]
12 @query.sub(/^\s+/, "")
13 @query.sub(/\s+$/, "")
15 if @query.match(/^[+-]?\d+(\.\d*)?\s*[\s,]\s*[+-]?\d+(\.\d*)?$/)
16 @sources.push "latlon"
17 elsif @query.match(/^\d{5}(-\d{4})?$/)
18 @sources.push "us_postcode"
19 elsif @query.match(/^(GIR 0AA|[A-PR-UWYZ]([0-9]{1,2}|([A-HK-Y][0-9]|[A-HK-Y][0-9]([0-9]|[ABEHMNPRV-Y]))|[0-9][A-HJKS-UW])\s*[0-9][ABD-HJLNP-UW-Z]{2})$/i)
20 @sources.push "uk_postcode"
21 @sources.push "osm_namefinder"
22 elsif @query.match(/^[A-Z]\d[A-Z]\s*\d[A-Z]\d$/i)
23 @sources.push "ca_postcode"
25 @sources.push "osm_namefinder"
26 @sources.push "geonames"
29 render :update do |page|
30 page.replace_html :sidebar_content, :partial => "search"
31 page.call "openSidebar"
36 # get query parameters
37 query = params[:query]
43 if m = query.match(/^\s*([+-]?\d+(\.\d*)?)\s*[\s,]\s*([+-]?\d+(\.\d*)?)\s*$/)
49 if lat < -90 or lat > 90
50 @error = "Latitude #{lat} out of range"
51 render :action => "error"
52 elsif lon < -180 or lon > 180
53 @error = "Longitude #{lon} out of range"
54 render :action => "error"
56 @results.push({:lat => lat, :lon => lon,
57 :zoom => APP_CONFIG['postcode_zoom'],
58 :name => "#{lat}, #{lon}"})
60 render :action => "results"
64 def search_us_postcode
65 # get query parameters
66 query = params[:query]
71 # ask geocoder.us (they have a non-commercial use api)
72 response = fetch_text("http://rpc.geocoder.us/service/csv?zip=#{escape_query(query)}")
75 unless response.match(/couldn't find this zip/)
76 data = response.split(/\s*,\s+/) # lat,long,town,state,zip
77 @results.push({:lat => data[0], :lon => data[1],
78 :zoom => APP_CONFIG['postcode_zoom'],
79 :prefix => "#{data[2]}, #{data[3]}, ",
83 render :action => "results"
84 rescue Exception => ex
85 @error = "Error contacting rpc.geocoder.us: #{ex.to_s}"
86 render :action => "error"
89 def search_uk_postcode
90 # get query parameters
91 query = params[:query]
96 # ask npemap.org.uk to do a combined npemap + freethepostcode search
97 response = fetch_text("http://www.npemap.org.uk/cgi/geocoder.fcgi?format=text&postcode=#{escape_query(query)}")
100 unless response.match(/Error/)
101 dataline = response.split(/\n/)[1]
102 data = dataline.split(/,/) # easting,northing,postcode,lat,long
103 postcode = data[2].gsub(/'/, "")
104 zoom = APP_CONFIG['postcode_zoom'] - postcode.count("#")
105 @results.push({:lat => data[3], :lon => data[4], :zoom => zoom,
109 render :action => "results"
110 rescue Exception => ex
111 @error = "Error contacting www.npemap.org.uk: #{ex.to_s}"
112 render :action => "error"
115 def search_ca_postcode
116 # get query parameters
117 query = params[:query]
120 # ask geocoder.ca (note - they have a per-day limit)
121 response = fetch_xml("http://geocoder.ca/?geoit=XML&postal=#{escape_query(query)}")
124 if response.get_elements("geodata/error").empty?
125 @results.push({:lat => response.get_text("geodata/latt").to_s,
126 :lon => response.get_text("geodata/longt").to_s,
127 :zoom => APP_CONFIG['postcode_zoom'],
128 :name => query.upcase})
131 render :action => "results"
132 rescue Exception => ex
133 @error = "Error contacting geocoder.ca: #{ex.to_s}"
134 render :action => "error"
137 def search_osm_namefinder
138 # get query parameters
139 query = params[:query]
141 # create result array
145 response = fetch_xml("http://gazetteer.openstreetmap.org/namefinder/search.xml?find=#{escape_query(query)}")
148 response.elements.each("searchresults/named") do |named|
149 lat = named.attributes["lat"].to_s
150 lon = named.attributes["lon"].to_s
151 zoom = named.attributes["zoom"].to_s
152 place = named.elements["place/named"] || named.elements["nearestplaces/named"]
153 type = named.attributes["info"].to_s.capitalize
154 name = named.attributes["name"].to_s
155 description = named.elements["description"].to_s
161 prefix = t "geocoder.search_osm_namefinder.prefix", :type => type
165 distance = format_distance(place.attributes["approxdistance"].to_i)
166 direction = format_direction(place.attributes["direction"].to_i)
167 placename = format_name(place.attributes["name"].to_s)
168 suffix = t "geocoder.search_osm_namefinder.suffix_place", :distance => distance, :direction => direction, :placename => placename
170 if place.attributes["rank"].to_i <= 30
175 place.elements.each("nearestplaces/named") do |nearest|
176 nearestrank = nearest.attributes["rank"].to_i
177 nearestscore = nearestrank / nearest.attributes["distance"].to_f
179 if nearestrank > 30 and
180 ( nearestscore > parentscore or
181 ( nearestscore == parentscore and nearestrank > parentrank ) )
183 parentrank = nearestrank
184 parentscore = nearestscore
189 parentname = format_name(parent.attributes["name"].to_s)
191 if place.attributes["info"].to_s == "suburb"
192 suffix = t "geocoder.search_osm_namefinder.suffix_suburb", :suffix => suffix, :parentname => parentname
194 parentdistance = format_distance(parent.attributes["approxdistance"].to_i)
195 parentdirection = format_direction(parent.attributes["direction"].to_i)
196 suffix = t "geocoder.search_osm_namefinder.suffix_parent", :suffix => suffix, :parentdistance => parentdistance, :parentdirection => parentdirection, :parentname => parentname
204 @results.push({:lat => lat, :lon => lon, :zoom => zoom,
205 :prefix => prefix, :name => name, :suffix => suffix,
206 :description => description})
209 render :action => "results"
210 rescue Exception => ex
211 @error = "Error contacting gazetteer.openstreetmap.org: #{ex.to_s}"
212 render :action => "error"
216 # get query parameters
217 query = params[:query]
219 # create result array
223 response = fetch_xml("http://ws.geonames.org/search?q=#{escape_query(query)}&maxRows=20")
226 response.elements.each("geonames/geoname") do |geoname|
227 lat = geoname.get_text("lat").to_s
228 lon = geoname.get_text("lng").to_s
229 name = geoname.get_text("name").to_s
230 country = geoname.get_text("countryName").to_s
231 @results.push({:lat => lat, :lon => lon,
232 :zoom => APP_CONFIG['geonames_zoom'],
234 :suffix => ", #{country}"})
237 render :action => "results"
238 rescue Exception => ex
239 @error = "Error contacting ws.geonames.org: #{ex.to_s}"
240 render :action => "error"
246 @sources.push({ :name => "osm_namefinder", :types => "cities", :max => 2 })
247 @sources.push({ :name => "osm_namefinder", :types => "towns", :max => 4 })
248 @sources.push({ :name => "osm_namefinder", :types => "places", :max => 10 })
249 @sources.push({ :name => "geonames" })
251 render :update do |page|
252 page.replace_html :sidebar_content, :partial => "description"
253 page.call "openSidebar"
257 def description_osm_namefinder
258 # get query parameters
261 types = params[:types]
264 # create result array
268 response = fetch_xml("http://gazetteer.openstreetmap.org/namefinder/search.xml?find=#{types}+near+#{lat},#{lon}&max=#{max}")
271 response.elements.each("searchresults/named") do |named|
272 lat = named.attributes["lat"].to_s
273 lon = named.attributes["lon"].to_s
274 zoom = named.attributes["zoom"].to_s
275 place = named.elements["place/named"] || named.elements["nearestplaces/named"]
276 type = named.attributes["info"].to_s
277 name = named.attributes["name"].to_s
278 description = named.elements["description"].to_s
279 distance = format_distance(place.attributes["approxdistance"].to_i)
280 direction = format_direction((place.attributes["direction"].to_i - 180) % 360)
281 prefix = t "geocoder.description_osm_namefinder.prefix", :distance => distance, :direction => direction, :type => type
282 @results.push({:lat => lat, :lon => lon, :zoom => zoom,
283 :prefix => prefix.capitalize, :name => name,
284 :description => description})
287 render :action => "results"
288 rescue Exception => ex
289 @error = "Error contacting gazetteer.openstreetmap.org: #{ex.to_s}"
290 render :action => "error"
293 def description_geonames
294 # get query parameters
298 # create result array
302 response = fetch_xml("http://ws.geonames.org/countrySubdivision?lat=#{lat}&lng=#{lon}")
305 response.elements.each("geonames/countrySubdivision") do |geoname|
306 name = geoname.get_text("adminName1").to_s
307 country = geoname.get_text("countryName").to_s
308 @results.push({:prefix => "#{name}, #{country}"})
311 render :action => "results"
312 rescue Exception => ex
313 @error = "Error contacting ws.geonames.org: #{ex.to_s}"
314 render :action => "error"
320 return Net::HTTP.get(URI.parse(url))
324 return REXML::Document.new(fetch_text(url))
327 def format_distance(distance)
328 return t("geocoder.distance", :count => distance)
331 def format_direction(bearing)
332 return t("geocoder.direction.south_west") if bearing >= 22.5 and bearing < 67.5
333 return t("geocoder.direction.south") if bearing >= 67.5 and bearing < 112.5
334 return t("geocoder.direction.south_east") if bearing >= 112.5 and bearing < 157.5
335 return t("geocoder.direction.east") if bearing >= 157.5 and bearing < 202.5
336 return t("geocoder.direction.north_east") if bearing >= 202.5 and bearing < 247.5
337 return t("geocoder.direction.north") if bearing >= 247.5 and bearing < 292.5
338 return t("geocoder.direction.north_west") if bearing >= 292.5 and bearing < 337.5
339 return t("geocoder.direction.west")
342 def format_name(name)
343 return name.gsub(/( *\[[^\]]*\])*$/, "")
346 def count_results(results)
349 results.each do |source|
350 count += source[:results].length if source[:results]
356 def escape_query(query)
357 return URI.escape(query, Regexp.new("[^#{URI::PATTERN::UNRESERVED}]", false, 'N'))