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我将 Google Developers 的 GMaps 代码用于 GMaps Elevation Service。通过单击地图，它会自动打开一个信息窗口。现在我尝试整合一个标记对象。我的目标是“冻结”地图上带有高程信息的标记。然而，一步一步，首先，通过点击地图我看不到任何标记。我将不胜感激。谢谢！

这是代码：

 var elevator;
 var map;

var freiburg = new google.maps.LatLng(47.9971865, 7.8537668);
var marker_options = {
         map : map,
         icon : {  url : 'http://maps.google.com/mapfiles/marker.png',
                   size : new google.maps.Size(32,32),
                   anchor : new google.maps.Point(0,0),
                   origin: new google.maps.Point(0,32)

         }
  };

var infowindow = new google.maps.InfoWindow();

 //new marker object

var marker = new google.maps.Marker(marker_options);



 function initialize() {
 var mapOptions = {
 zoom: 13,
 center: freiburg,
 mapTypeId: 'terrain'
 }

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


 // Create an ElevationService
 elevator = new google.maps.ElevationService();

 // Add a listener for the click event and call getElevation on that location
  google.maps.event.addListener(map, 'click', getElevation);
   }

function getElevation(event) {

 var locations = [];

 // Retrieve the clicked location and push it on the array
 var clickedLocation = event.latLng;
 locations.push(clickedLocation);

  // Create a LocationElevationRequest object using the array's one value
  var positionalRequest = {
  'locations': locations
   }

  // Initiate the location request
  elevator.getElevationForLocations(positionalRequest, function(results, status) {
  if (status == google.maps.ElevationStatus.OK) {

  // Retrieve the first result
  if (results[0]) {

    //position Marker
    marker.setPosition(clickedLocation);

    // Open an info window indicating the elevation at the clicked position
    infowindow.setContent(Math.round(results[0].elevation) + ' m. N. N.');
    infowindow.setPosition(clickedLocation);
    infowindow.open(map);
  } else {
    alert('No results found');
  }
  } 
   else {
     alert('Elevation service failed due to: ' + status);
    }
     });
         }
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1 回答 1

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To see the marker on the map, you need to set the "map" property of the google.maps.Marker object:

   marker.setMap(map);

working example

working example with custom icon definition

于 2013-10-09T12:44:44.937 回答