Google Maps API で住所から緯度・経度を取得する方法

//住所から XML データを取得
(var: 'gmap_response') = (include_url: 'http://maps.google.com/maps/geo?q=' + (encode_url: '住所' + '&output=xml&key=' + (encode_url: 'Google Maps API Key'));

(var: 'gmap_xml_temp') = (xml: $gmap_response);

//[xml_tree] を使って XML データをパース処理
(var: 'gmap_xml') = (xml_tree: $gmap_xml_temp);

//エラーの確認
(var: 'gmap_status') = $gmap_xml -> response -> status -> code -> contents;

//エラーがなければ緯度・経度を取得
if: $gmap_status == 200;

(var: 'gmap_coordinates') = $gmap_xml -> response -> placemark(1) -> point -> coordinates -> contents;

(var: 'gmap_lat') = ($gmap_coordinates -> (split: ',')) -> (get: 2);

(var: 'gmap_lng') = ($gmap_coordinates -> (split: ',')) -> (get: 1);

/if;