Google 地理编码 Javascript API - 如何获取坐标？

Question

我想要 Google 地图将用户提交的地址转换为地图坐标。我只想将这些坐标存储在一个变量中，以便稍后访问：

function map_search() {
    console.log("search form functional"); // sanity check
    var searchLoc = $('#search_location').val();
    console.log(searchLoc);
    var searchCoords = geocoder.geocode( {'address': searchLoc});
    console.log(searchCoords);

    ...
}

我是这样设置的：

var geocoder = new google.maps.Geocoder();

这在定义 var seachCoords 之前有效。在控制台中，它只是打印为 undefined.

其他Google 地图功能在此页面上运行成功。是我的 JavaScript 错了，还是我使用此地理编码器不当？

Answer 1

试试这个 php 脚本：

function getCoordinates($address){

$address = str_replace(" ", "+", $address); // replace all the white space with "+" sign to match with google search pattern

$url = "http://maps.google.com/maps/api/geocode/json?sensor=false&address=$address";

$response = file_get_contents($url);

$json = json_decode($response,TRUE); //generate array object from the response from the web

return ($json['results'][0]['geometry']['location']['lat'].",".$json['results'][0]['geometry']['location']['lng']);

}

如何调用php中的函数：

echo getCoordinates('740 Story Rd San Jose CA 95122');
Result : 37.328865,-121.8581845

Answer 2

来自 https://developers.google.com/maps/documentation/javascript/geocoding

的文档

The Geocoding service requires a callback method to execute upon retrieval of the geocoder's results. This callback should pass two parameters to hold the results and a status code, in that order.

示例：

geocoder.geocode( { 'address': address}, function(results, status) {
      if (status == google.maps.GeocoderStatus.OK) {
        console.log(results); // all results
        console.log(results[0].geometry.location); // "first" location
      } else {
        alert("Geocode was not successful for the following reason: " + status);
      }
    });

注意：这是本质上的异步，所以不要试图将它放在 returns results[0].geometry.location 的函数中 [= =22=] 语句

Google 地理编码 Javascript API - 如何获取坐标？

Google Geocode Javascript API - How to get coordinates?

javascript

google-maps

geocoding

google-maps-api-3