Class: Drifter::Geocoders::Google
- Defined in:
- lib/drifter/geocoders/google.rb
Overview
This class adds support for Google’s geocoding API: code.google.com/apis/maps/documentation/geocoding/
Constant Summary collapse
- GOOGLE_BASE_URI =
'http://maps.googleapis.com/maps/api/geocode/json'
Class Method Summary collapse
-
.base_uri ⇒ Object
nodoc.
-
.geocode(location, params = {}) ⇒ Object
This method works exactly like Drifter::Geocoders::Yahoo.geocode() See that method for more info.
-
.query_uri(params = {}) ⇒ Object
Google requires a ‘sensor’ parameter.
Methods inherited from Base
Class Method Details
.base_uri ⇒ Object
nodoc
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# File 'lib/drifter/geocoders/google.rb', line 14 def self.base_uri GOOGLE_BASE_URI end |
.geocode(location, params = {}) ⇒ Object
This method works exactly like Drifter::Geocoders::Yahoo.geocode() See that method for more info. The returned Drifter::Location objects have the following attributes:
:address, :city, :state, :state_code, :country, :country_code,
:post_code, :lat, :lng
Additional google specific attributes can be accessed using the Location object’s data() method
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# File 'lib/drifter/geocoders/google.rb', line 28 def self.geocode(location, params={}) params[:address] = location # check for reverse gecoding lat, lng = Drifter.extract_latlng(location) if lat && lng params.delete(:address) params[:latlng] = [lat, lng].join(',') end uri = query_uri(params) response = fetch(uri) # check for errors and return if necassary doc = JSON.parse(response) unless ["OK", "ZERO_RESULTS"].include?(doc["status"]) @@last_error = { :code => doc["status"], :message => doc["status"] } return nil end # still here so safe to clear errors @@last_error = nil # is there anything to parse? return [] if doc["status"] == "ZERO_RESULTS" doc["results"].collect do |result| loc = Drifter::Location.new loc.raw_data_format = :hash loc.raw_data = result loc.geocoder = :google loc.address = result["formatted_address"] loc.lat = result["geometry"]["location"]["lat"] loc.lng = result["geometry"]["location"]["lng"] result["address_components"].each do |comp| loc.country_code = comp["short_name"] if comp["types"].include?("country") loc.country = comp["long_name"] if comp["types"].include?("country") loc.city = comp["long_name"] if comp["types"].include?("locality") loc.post_code = comp["long_name"] if comp["types"].include?("postal_code") loc.state = comp["long_name"] if comp["types"].include?("administrative_area_level_1") loc.state_code = comp["short_name"] if comp["types"].include?("administrative_area_level_1") end loc end end |
.query_uri(params = {}) ⇒ Object
Google requires a ‘sensor’ parameter. If none is set, it defaults to false See their docs for more info
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# File 'lib/drifter/geocoders/google.rb', line 81 def self.query_uri(params={}) params[:sensor] ||= 'false' uri = URI.parse(base_uri) uri.query = hash_to_query_string(params) return uri end |