-class GeocoderController < ApplicationController
- layout 'site'
+# coding: utf-8
+class GeocoderController < ApplicationController
+ require 'uri'
require 'net/http'
require 'rexml/document'
+ before_filter :authorize_web
+ before_filter :set_locale
+ before_filter :convert_latlon, :only => [:search]
+
def search
- res_hash = {}
- @postcode_arr = []
- @res_ary = []
-
- if params[:query][:postcode]
- postcode = params[:query][:postcode]
- if postcode.match(/(^\d{5}$)|(^\d{5}-\d{4}$)/)
- #its a zip code - do something
- else
- Net::HTTP.start('www.freethepostcode.org') do |http|
- resp = http.get("/geocode?postcode=#{postcode}")
- lat = resp.body.scan(/[4-6][0-9]\.?[0-9]+/)
- lon = resp.body.scan(/[-+][0-9]\.?[0-9]+/)
- @postcode_array = [lat, lon]
- redirect_to "/index.html?lat=#{@postcode_array[0]}&lon=#{@postcode_array[1]}&zoom=14"
- end
- end
+ @query = params[:query]
+ @sources = Array.new
+
+ @query.sub(/^\s+/, "")
+ @query.sub(/\s+$/, "")
+
+ if @query.match(/^[+-]?\d+(\.\d*)?\s*[\s,]\s*[+-]?\d+(\.\d*)?$/)
+ @sources.push "latlon"
+ elsif @query.match(/^\d{5}(-\d{4})?$/)
+ @sources.push "us_postcode"
+ @sources.push "osm_nominatim"
+ elsif @query.match(/^(GIR 0AA|[A-PR-UWYZ]([0-9]{1,2}|([A-HK-Y][0-9]|[A-HK-Y][0-9]([0-9]|[ABEHMNPRV-Y]))|[0-9][A-HJKS-UW])\s*[0-9][ABD-HJLNP-UW-Z]{2})$/i)
+ @sources.push "uk_postcode"
+ @sources.push "osm_nominatim"
+ elsif @query.match(/^[A-Z]\d[A-Z]\s*\d[A-Z]\d$/i)
+ @sources.push "ca_postcode"
+ @sources.push "osm_nominatim"
+ else
+ @sources.push "osm_nominatim"
+ @sources.push "geonames" if defined?(GEONAMES_USERNAME)
+ end
+ end
+
+ def search_latlon
+ # get query parameters
+ query = params[:query]
+
+ # create result array
+ @results = Array.new
+
+ # decode the location
+ if m = query.match(/^\s*([+-]?\d+(\.\d*)?)\s*[\s,]\s*([+-]?\d+(\.\d*)?)\s*$/)
+ lat = m[1].to_f
+ lon = m[3].to_f
+ end
+
+ # generate results
+ if lat < -90 or lat > 90
+ @error = "Latitude #{lat} out of range"
+ render :action => "error"
+ elsif lon < -180 or lon > 180
+ @error = "Longitude #{lon} out of range"
+ render :action => "error"
else
- if params[:query][:place_name] != nil or ""
- place_name = params[:query][:place_name]
- Net::HTTP.start('ws.geonames.org') do |http|
- res = http.get("/search?q=#{place_name}&maxRows=10")
- xml = REXML::Document.new(res.body)
- xml.elements.each("geonames/geoname") do |ele|
- res_hash = {}
- ele.elements.each("name"){ |n| res_hash['name'] = n.text }
- ele.elements.each("countryCode"){ |n| res_hash['country_code'] = n.text }
- ele.elements.each("countryNode"){ |n| res_hash['country_name'] = n.text }
- ele.elements.each("lat"){ |n| res_hash['lat'] = n.text }
- ele.elements.each("lng"){ |n| res_hash['lon']= n.text }
- @res_ary << res_hash
- end
- end
+ @results.push({:lat => lat, :lon => lon,
+ :zoom => POSTCODE_ZOOM,
+ :name => "#{lat}, #{lon}"})
+
+ render :action => "results"
+ end
+ end
+
+ def search_us_postcode
+ # get query parameters
+ query = params[:query]
+
+ # create result array
+ @results = Array.new
+
+ # ask geocoder.us (they have a non-commercial use api)
+ response = fetch_text("http://rpc.geocoder.us/service/csv?zip=#{escape_query(query)}")
+
+ # parse the response
+ unless response.match(/couldn't find this zip/)
+ data = response.split(/\s*,\s+/) # lat,long,town,state,zip
+ @results.push({:lat => data[0], :lon => data[1],
+ :zoom => POSTCODE_ZOOM,
+ :prefix => "#{data[2]}, #{data[3]},",
+ :name => data[4]})
+ end
+
+ render :action => "results"
+ rescue Exception => ex
+ @error = "Error contacting rpc.geocoder.us: #{ex.to_s}"
+ render :action => "error"
+ end
+
+ def search_uk_postcode
+ # get query parameters
+ query = params[:query]
+
+ # create result array
+ @results = Array.new
+
+ # ask npemap.org.uk to do a combined npemap + freethepostcode search
+ response = fetch_text("http://www.npemap.org.uk/cgi/geocoder.fcgi?format=text&postcode=#{escape_query(query)}")
+
+ # parse the response
+ unless response.match(/Error/)
+ dataline = response.split(/\n/)[1]
+ data = dataline.split(/,/) # easting,northing,postcode,lat,long
+ postcode = data[2].gsub(/'/, "")
+ zoom = POSTCODE_ZOOM - postcode.count("#")
+ @results.push({:lat => data[3], :lon => data[4], :zoom => zoom,
+ :name => postcode})
+ end
+
+ render :action => "results"
+ rescue Exception => ex
+ @error = "Error contacting www.npemap.org.uk: #{ex.to_s}"
+ render :action => "error"
+ end
+
+ def search_ca_postcode
+ # get query parameters
+ query = params[:query]
+ @results = Array.new
+
+ # ask geocoder.ca (note - they have a per-day limit)
+ response = fetch_xml("http://geocoder.ca/?geoit=XML&postal=#{escape_query(query)}")
+
+ # parse the response
+ if response.get_elements("geodata/error").empty?
+ @results.push({:lat => response.get_text("geodata/latt").to_s,
+ :lon => response.get_text("geodata/longt").to_s,
+ :zoom => POSTCODE_ZOOM,
+ :name => query.upcase})
+ end
+
+ render :action => "results"
+ rescue Exception => ex
+ @error = "Error contacting geocoder.ca: #{ex.to_s}"
+ render :action => "error"
+ end
+
+ def search_osm_nominatim
+ # get query parameters
+ query = params[:query]
+ minlon = params[:minlon]
+ minlat = params[:minlat]
+ maxlon = params[:maxlon]
+ maxlat = params[:maxlat]
+
+ # get view box
+ if minlon && minlat && maxlon && maxlat
+ viewbox = "&viewbox=#{minlon},#{maxlat},#{maxlon},#{minlat}"
+ end
+
+ # get objects to excude
+ if params[:exclude]
+ exclude = "&exclude_place_ids=#{params[:exclude].join(',')}"
+ end
+
+ # ask nominatim
+ response = fetch_xml("#{NOMINATIM_URL}search?format=xml&q=#{escape_query(query)}#{viewbox}#{exclude}&accept-language=#{http_accept_language.user_preferred_languages.join(',')}")
+
+ # create result array
+ @results = Array.new
+
+ # create parameter hash for "more results" link
+ @more_params = params.reverse_merge({ :exclude => [] })
+
+ # extract the results from the response
+ results = response.elements["searchresults"]
+
+ # parse the response
+ results.elements.each("place") do |place|
+ lat = place.attributes["lat"].to_s
+ lon = place.attributes["lon"].to_s
+ klass = place.attributes["class"].to_s
+ type = place.attributes["type"].to_s
+ name = place.attributes["display_name"].to_s
+ min_lat,max_lat,min_lon,max_lon = place.attributes["boundingbox"].to_s.split(",")
+ prefix_name = t "geocoder.search_osm_nominatim.prefix.#{klass}.#{type}", :default => type.gsub("_", " ").capitalize
+ if klass == 'boundary' and type == 'administrative'
+ rank = (place.attributes["place_rank"].to_i + 1) / 2
+ prefix_name = t "geocoder.search_osm_nominatim.admin_levels.level#{rank}", :default => prefix_name
end
- redirect_to :controller => 'geocoder', :action => 'results', :params => @res_ary
+ prefix = t "geocoder.search_osm_nominatim.prefix_format", :name => prefix_name
+ object_type = place.attributes["osm_type"]
+ object_id = place.attributes["osm_id"]
+
+ @results.push({:lat => lat, :lon => lon,
+ :min_lat => min_lat, :max_lat => max_lat,
+ :min_lon => min_lon, :max_lon => max_lon,
+ :prefix => prefix, :name => name,
+ :type => object_type, :id => object_id})
+ @more_params[:exclude].push(place.attributes["place_id"].to_s)
end
+
+ render :action => "results"
+# rescue Exception => ex
+# @error = "Error contacting nominatim.openstreetmap.org: #{ex.to_s}"
+# render :action => "error"
end
- def result
- @res = :params[@res_ary]
+ def search_geonames
+ # get query parameters
+ query = params[:query]
+
+ # create result array
+ @results = Array.new
+
+ # ask geonames.org
+ response = fetch_xml("http://api.geonames.org/search?q=#{escape_query(query)}&maxRows=20&username=#{GEONAMES_USERNAME}")
+
+ # parse the response
+ response.elements.each("geonames/geoname") do |geoname|
+ lat = geoname.get_text("lat").to_s
+ lon = geoname.get_text("lng").to_s
+ name = geoname.get_text("name").to_s
+ country = geoname.get_text("countryName").to_s
+ @results.push({:lat => lat, :lon => lon,
+ :zoom => GEONAMES_ZOOM,
+ :name => name,
+ :suffix => ", #{country}"})
+ end
+
+ render :action => "results"
+ rescue Exception => ex
+ @error = "Error contacting ws.geonames.org: #{ex.to_s}"
+ render :action => "error"
end
+
+ def description
+ @sources = Array.new
+
+ @sources.push({ :name => "osm_nominatim" })
+ @sources.push({ :name => "geonames" })
+ end
+
+ def description_osm_nominatim
+ # get query parameters
+ lat = params[:lat]
+ lon = params[:lon]
+ zoom = params[:zoom]
+
+ # create result array
+ @results = Array.new
+
+ # ask nominatim
+ response = fetch_xml("#{NOMINATIM_URL}reverse?lat=#{lat}&lon=#{lon}&zoom=#{zoom}&accept-language=#{http_accept_language.user_preferred_languages.join(',')}")
+
+ # parse the response
+ response.elements.each("reversegeocode/result") do |result|
+ description = result.get_text.to_s
+
+ @results.push({:prefix => "#{description}"})
+ end
+
+ render :action => "results"
+ rescue Exception => ex
+ @error = "Error contacting nominatim.openstreetmap.org: #{ex.to_s}"
+ render :action => "error"
+ end
+
+ def description_geonames
+ # get query parameters
+ lat = params[:lat]
+ lon = params[:lon]
+
+ # create result array
+ @results = Array.new
+
+ # ask geonames.org
+ response = fetch_xml("http://ws.geonames.org/countrySubdivision?lat=#{lat}&lng=#{lon}")
+
+ # parse the response
+ response.elements.each("geonames/countrySubdivision") do |geoname|
+ name = geoname.get_text("adminName1").to_s
+ country = geoname.get_text("countryName").to_s
+ @results.push({:prefix => "#{name}, #{country}"})
+ end
+
+ render :action => "results"
+ rescue Exception => ex
+ @error = "Error contacting ws.geonames.org: #{ex.to_s}"
+ render :action => "error"
+ end
+
+private
+
+ def fetch_text(url)
+ return Net::HTTP.get(URI.parse(url))
+ end
+
+ def fetch_xml(url)
+ return REXML::Document.new(fetch_text(url))
+ end
+
+ def format_distance(distance)
+ return t("geocoder.distance", :count => distance)
+ end
+
+ def format_direction(bearing)
+ return t("geocoder.direction.south_west") if bearing >= 22.5 and bearing < 67.5
+ return t("geocoder.direction.south") if bearing >= 67.5 and bearing < 112.5
+ return t("geocoder.direction.south_east") if bearing >= 112.5 and bearing < 157.5
+ return t("geocoder.direction.east") if bearing >= 157.5 and bearing < 202.5
+ return t("geocoder.direction.north_east") if bearing >= 202.5 and bearing < 247.5
+ return t("geocoder.direction.north") if bearing >= 247.5 and bearing < 292.5
+ return t("geocoder.direction.north_west") if bearing >= 292.5 and bearing < 337.5
+ return t("geocoder.direction.west")
+ end
+
+ def format_name(name)
+ return name.gsub(/( *\[[^\]]*\])*$/, "")
+ end
+
+ def count_results(results)
+ count = 0
+
+ results.each do |source|
+ count += source[:results].length if source[:results]
+ end
+
+ return count
+ end
+
+ def escape_query(query)
+ return URI.escape(query, Regexp.new("[^#{URI::PATTERN::UNRESERVED}]", false, 'N'))
+ end
+
+ def convert_latlon
+ @query = params[:query]
+
+ if latlon = @query.match(/^([NS])\s*(\d{1,3}(\.\d*)?)\W*([EW])\s*(\d{1,3}(\.\d*)?)$/).try(:captures) # [NSEW] decimal degrees
+ params[:query] = nsew_to_decdeg(latlon)
+ elsif latlon = @query.match(/^(\d{1,3}(\.\d*)?)\s*([NS])\W*(\d{1,3}(\.\d*)?)\s*([EW])$/).try(:captures) # decimal degrees [NSEW]
+ params[:query] = nsew_to_decdeg(latlon)
+
+ elsif latlon = @query.match(/^([NS])\s*(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?\W*([EW])\s*(\d{1,3})°?\s*(\d{1,3}(\.\d*)?)?['′]?$/).try(:captures) # [NSEW] degrees, decimal minutes
+ params[:query] = ddm_to_decdeg(latlon)
+ 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])$/).try(:captures) # degrees, decimal minutes [NSEW]
+ params[:query] = ddm_to_decdeg(latlon)
+
+ elsif latlon = @query.match(/^([NS])\s*(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]?\W*([EW])\s*(\d{1,3})°?\s*(\d{1,2})['′]?\s*(\d{1,3}(\.\d*)?)?["″]?$/).try(:captures) # [NSEW] degrees, minutes, decimal seconds
+ params[:query] = dms_to_decdeg(latlon)
+ 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]
+ params[:query] = dms_to_decdeg(latlon)
+ else
+ return
+ end
+ end
+
+ def nsew_to_decdeg(captures)
+ begin
+ Float(captures[0])
+ captures[2].downcase != 's' ? lat = captures[0].to_f : lat = -(captures[0].to_f)
+ captures[5].downcase != 'w' ? lon = captures[3].to_f : lon = -(captures[3].to_f)
+ rescue
+ captures[0].downcase != 's' ? lat = captures[1].to_f : lat = -(captures[1].to_f)
+ captures[3].downcase != 'w' ? lon = captures[4].to_f : lon = -(captures[4].to_f)
+ end
+ return "#{lat}, #{lon}"
+ end
+
+ def ddm_to_decdeg(captures)
+ begin
+ Float(captures[0])
+ captures[3].downcase != 's' ? lat = captures[0].to_f + captures[1].to_f/60 : lat = -(captures[0].to_f + captures[1].to_f/60)
+ captures[7].downcase != 'w' ? lon = captures[4].to_f + captures[5].to_f/60 : lon = -(captures[4].to_f + captures[5].to_f/60)
+ rescue
+ captures[0].downcase != 's' ? lat = captures[1].to_f + captures[2].to_f/60 : lat = -(captures[1].to_f + captures[2].to_f/60)
+ captures[4].downcase != 'w' ? lon = captures[5].to_f + captures[6].to_f/60 : lon = -(captures[5].to_f + captures[6].to_f/60)
+ end
+ return "#{lat}, #{lon}"
+ end
+
+ def dms_to_decdeg(captures)
+ begin
+ Float(captures[0])
+ 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)
+ 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)
+ rescue
+ 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)
+ 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)
+ end
+ return "#{lat}, #{lon}"
+ end
+
end
projects / rails.git / blobdiff