根据城市名称 google 地图获取坐标

Question

我正在尝试使用 google 地图创建基于城市的坐标，这是我现在的示例，我总是出错？

var address = 'Zurich, Ch';

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

geocoder.geocode({
  'address': address
}, function(results, status) {
  if (status == google.maps.GeocoderStatus.OK) {
    var Lat = results[0].geometry.location.lat();
    var Lng = results[0].geometry.location.lng();
  } else {
    alert("Something got wrong " + status);
  }
});

var myOptions = {
  zoom: 11,
  center: new google.maps.LatLng(Lat, Lng),
};

Answer 1

地理编码器是异步的。您需要在回调函数中使用返回的数据when/where可用。

相关问题：Using Address Instead Of Longitude And Latitude With Google Maps API

proof of concept fiddle

代码片段：

function initialize() {
  var address = 'Zurich, Ch';

  var geocoder = new google.maps.Geocoder();
  geocoder.geocode({
    'address': address
  }, function(results, status) {
    if (status == google.maps.GeocoderStatus.OK) {
      var Lat = results[0].geometry.location.lat();
      var Lng = results[0].geometry.location.lng();
      var myOptions = {
        zoom: 11,
        center: new google.maps.LatLng(Lat, Lng)
      };
      var map = new google.maps.Map(
        document.getElementById("map_canvas"), myOptions);
    } else {
      alert("Something got wrong " + status);
    }
  });
}
google.maps.event.addDomListener(window, "load", initialize);

html,
body,
#map_canvas {
  height: 100%;
  width: 100%;
  margin: 0px;
  padding: 0px
}

<script src="https://maps.googleapis.com/maps/api/js"></script>
<div id="map_canvas"></div>

根据城市名称 google 地图获取坐标

Getting coordinates based on city name google map

google-maps

geocode