Google地图 - 使用地理编码器通过javascript获取长/ lat

Question

我试图从谷歌地图api获取经度和纬度值与地址,但它似乎没有返回任何值.我的语法有问题吗？

var point = GClientGeocoder.getLatLng('1600 Pennsylvania Avenue NW Washington, DC 20500');
alert(point);

Answer 1

It seems like you're using v2 of Google Maps; if you're interested in using v3 (since Google has officially deprecated version 2), you could do something like this:

var mygc = new google.maps.Geocoder();
mygc.geocode({'address' : '1600 Pennsylvania Avenue NW Washington, DC 20500'}, function(results, status){
    console.log( "latitude : " + results[0].geometry.location.lat() );
    console.log( "longitude : " + results[0].geometry.location.lng() );
});

It's similar to the other examples except:

• You call new google.maps.Geocoder() instead of GClientGeocoder()
• You pass in an object with an 'address' property, instead of the string by itself
• 结果是一个JSON对象,这意味着你必须以不同的方式访问lat/lng

在谷歌API文档有V3的更多细节.干杯!

Answer 2

这有效(前提是您拥有正确的API密钥,受限于2500个请求/天的速率限制):

address_string = '1600 Pennsylvania Avenue NW Washington, DC 20500';
geocoder = new GClientGeocoder();
geocoder.getLatLng(
    address_string,
    function(point) {
        if (point !== null) {
            alert(point); // or do whatever else with it
        } else {
            // error - not found, over limit, etc.
        }
    }
);

您似乎正在调用函数GClientGeocoder,您需要在其中创建new GClientGeocoder()并调用其函数.