Question

我需要的是......例如，伦敦的lat和lng 所以我将一个字符串'london'传入一个函数然后该函数返回lat和lng，所以我可以在google map中将'center'位置设置为london。

这是我的代码：

 function initialize() {
 // i have below line working, as i was passing in lat and lng value directly....
//var latitudeLongtitude = new google.maps.LatLng(centreLatitude, centreLongitude)
 // now i m trying to pass in a string - 'london'  , it is not working....


          var latitudeLongtitude = new google.maps.LatLng(getLatLong("London").lat(), getLatLong("London").lng());


            var mapOptions = {
              zoom: zoom,
              center: latitudeLongtitude,
              mapTypeId: mapType
            };

            var map = new google.maps.Map(document.getElementById('map-canvas'),
                mapOptions);

            var marker = new google.maps.Marker({
                position: latitudeLongtitude,
                map: map,
                title: 'Hello World!',
                icon: markersImage
            });
          }
    google.maps.event.addDomListener(window, 'load', initialize);


function getLatLong(address){
        var geo = new google.maps.Geocoder;

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

         });

    }

基本上，我试图在this example

上修改代码库

请任何人都可以帮我解决CODE示例，谢谢......

Answer 1

由于google.maps.Geocoder是异步方法，因此您需要在收到响应后调用initialize()：

geo.geocode({'address':address},function(results, status){
    if (status == google.maps.GeocoderStatus.OK) {
        initialize( results[0].geometry.location.lat, results[0].geometry.location.lng );
    } else {
        alert("Geocode was not successful for the following reason: " + status);
    }
});

并将您的initialize()功能更改为接受lat和lng参数：

function initialize( lat, lng ) {
    var latitudeLongtitude = new google.maps.LatLng( lat, lng );
//....

之后，您可以通过调用

来初始化地图

getLatLong( 'London' );

如何通过文本地址获取位置的纬度和经度

1 个答案: