谷歌地图 - 使用地理编码器通过 javascript 获取长/纬度
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Google Maps - using geocoder to get long/lat with javascript
提问by Queueball
I'm trying to get longitude and latitude values from the google maps api with an address, however it doesn't seem to be returning any value. Is there a problem with my syntax?
我正在尝试从带有地址的 google maps api 获取经度和纬度值，但是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);
采纳答案by Piskvor left the building
This works (provided you have the correct API key, subject to the 2500 requests/day rate limit):
这是有效的（前提是您拥有正确的 API 密钥，受 2500 次请求/天的速率限制限制）：
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.
}
}
);
You seem to be calling a function of GClientGeocoder, where you need to create a new GClientGeocoder()and call itsfunction.
您似乎正在调用 的函数GClientGeocoder，您需要在其中创建 anew GClientGeocoder()并调用其函数。
回答by Christopher Scott
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:
看起来您使用的是 Google Maps v2；如果您对使用 v3 感兴趣（因为 Google 已正式弃用第 2 版），您可以执行以下操作：
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:
它类似于其他示例，除了：
- You call new google.maps.Geocoder()instead of GClientGeocoder()
- You pass in an object with an 'address' property, instead of the string by itself
- The results is a JSON object, which means you have to access lat/lng a little differently
- 您调用new google.maps.Geocoder()而不是 GClientGeocoder()
- 您传入一个具有“地址”属性的对象，而不是字符串本身
- 结果是一个 JSON 对象，这意味着您必须以稍微不同的方式访问 lat/lng
The Google API docshave more detail for v3. Cheers!
在谷歌API文档有V3的更多细节。干杯!
回答by Ankit Jaiswal
Try it like:
试试看：
geocoder = new GClientGeocoder();
point = geocoder.getLatLng(address)
