Geocoderは既存APIをつかって地理情報を検索できる便利Gemです
導入
$ gem install geocoder
基本的な使い方
Geocoder.configure(language: "ja", units: "km", :lookup => :google) => {:timeout=>3, :lookup=>:google, :ip_lookup=>:freegeoip, :language=>"ja", :http_headers=>{}, :use_https=>false, :http_proxy=>nil, :https_proxy=>nil, :api_key=>nil, :cache=>nil, :cache_prefix=>"geocoder:", :always_raise=>[], :units=>"km", :distances=>:linear, :chache_prefix=>nil} Geocoder.search("Tokyo") => [#<Geocoder::Result::Google:0x007fed93624f48 @cache_hit=nil, @data= {"address_components"=> [{"long_name"=>"東京都", "short_name"=>"東京都", "types"=>["administrative_area_level_1", "political"]}, {"long_name"=>"日本", "short_name"=>"JP", "types"=>["country", "political"]}], "formatted_address"=>"日本, 東京都", "geometry"=> {"bounds"=> {"northeast"=>{"lat"=>35.8986441, "lng"=>153.9852295}, "southwest"=>{"lat"=>24.2242343, "lng"=>138.9427579}}, "location"=>{"lat"=>35.6894875, "lng"=>139.6917064}, "location_type"=>"APPROXIMATE", "viewport"=> {"northeast"=>{"lat"=>35.817813, "lng"=>139.910202}, "southwest"=>{"lat"=>35.528873, "lng"=>139.510574}}}, "types"=>["administrative_area_level_1", "political"]}>]
郵便番号
ちゃんとクエリを書いてあげれば郵便番号から番号を引く事だってできます。
Geocoder.search("182-8585", params: {contorycodes: "ja"}) => [#<Geocoder::Result::Google:0x007fed936d7d28 @cache_hit=nil, @data= {"address_components"=> [{"long_name"=>"182-8585", "short_name"=>"182-8585", "types"=>["postal_code"]}, {"long_name"=>"日本", "short_name"=>"JP", "types"=>["country", "political"]}], "formatted_address"=>"〒182-8585, 日本", "geometry"=> {"location"=>{"lat"=>35.6560942, "lng"=>139.5440317}, "location_type"=>"APPROXIMATE", "viewport"=> {"northeast"=>{"lat"=>35.65744318029149, "lng"=>139.5453806802915}, "southwest"=>{"lat"=>35.6547452197085, "lng"=>139.5426827197085}}}, "types"=>["postal_code"]}>]
検索エンジンの変更
デフォではgoogleですが、オープンデータ系のものに切り替える事も可能です
例では、nominatimを使っています。
Geocoder.configure(language: "ja", units: "km", :lookup => :nominatim) => {:timeout=>3, :lookup=>:nominatim, :ip_lookup=>:freegeoip, :language=>"ja", :http_headers=>{}, :use_https=>false, :http_proxy=>nil, :https_proxy=>nil, :api_key=>nil, :cache=>nil, :cache_prefix=>"geocoder:", :always_raise=>[], :units=>"km", :distances=>:linear, :chache_prefix=>nil} Geocoder.search("university of electro-communications") => [#<Geocoder::Result::Nominatim:0x007fed9364d880 @cache_hit=nil, @data= {"place_id"=>"43601982", "licence"=> "Data © OpenStreetMap contributors, ODbL 1.0. http://www.openstreetmap.org/copyright", ...
yahooのようなkeyが必要な物は、別途取得・導入してから使って下さい。
