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如何在googlemapsjsapi中获得仍然包含一组Lat/Long坐标的最小LatLngBounds?

google-maps-api-3 google-maps javascript

5

airportyh · 技术社区 · 15 年前

我需要在地图上绘制一组坐标以响应用户的选择,当发生这种情况时,我希望平移地图以聚焦于这组点。如何找到包含所有坐标的最小边界框(LatLngBounds)?

1 回复 | 直到 15 年前

1

12

Community Mohan Dere 8 年前

除了 Stack Overflow post which @Crescent Fresh pointed to above (使用的是v2api),您希望使用的方法是 LatLngBounds.extend()

下面是一个完整的示例,使用 v3 API :

<!DOCTYPE html>
<html> 
<head> 
   <meta http-equiv="content-type" content="text/html; charset=UTF-8"/> 
   <title>Google Maps LatLngBounds.extend() Demo</title> 
   <script src="http://maps.google.com/maps/api/js?sensor=false" 
           type="text/javascript"></script> 
</head> 
<body> 
   <div id="map" style="width: 400px; height: 300px;"></div> 

   <script type="text/javascript"> 

   var map = new google.maps.Map(document.getElementById('map'), { 
     mapTypeId: google.maps.MapTypeId.TERRAIN
   });

   var markerBounds = new google.maps.LatLngBounds();

   var randomPoint, i;

   for (i = 0; i < 10; i++) {
     // Generate 10 random points within North East America
     randomPoint = new google.maps.LatLng( 39.00 + (Math.random() - 0.5) * 20, 
                                          -77.00 + (Math.random() - 0.5) * 20);

     // Draw a marker for each random point
     new google.maps.Marker({
       position: randomPoint, 
       map: map
     });

     // Extend markerBounds with each random point.
     markerBounds.extend(randomPoint);
   }

   // At the end markerBounds will be the smallest bounding box to contain
   // our 10 random points

   // Finally we can call the Map.fitBounds() method to set the map to fit
   // our markerBounds
   map.fitBounds(markerBounds);

   </script> 
</body> 
</html>

截图:

Google Maps LatLngBounds.extend() Demo