区域掩模

通过 mask 属性为地图对象设定区域掩模,只显示区域内的图层和覆盖物

源代码编辑器

 <!DOCTYPE HTML>
<html>
<head>
<meta name="viewport" content="width=device-width initial-scale=1.0 maximum-scale=1.0 user-scalable=0">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>区域掩模</title>
<style>
body,html,#container{ margin:0;width: 100%;height: 100%}
</style>
</head>
<body>
<div id="container"></div>
<script language="javascript" src="https://webapi.amap.com/maps?v=2.0&key=您申请的key值&plugin=AMap.DistrictSearch"></script> 
<script language="javascript">
 var opts = {
 subdistrict: 0,
 extensions: 'all',
 level: 'city'
 };
 //利用行政区查询获取边界构建mask路径
 //也可以直接通过经纬度构建mask路径
 var district = new AMap.DistrictSearch(opts);
 district.search('北京市', function(status, result) {
 var bounds = result.districtList[0].boundaries;
 var mask = []
 for(var i =0;i<bounds.length;i+=1){
 mask.push([bounds[i]])
 }
 var map = new AMap.Map('container', {
 mask:mask,
 center:[116.472804,39.995725],
 viewMode:'3D',
 showLabel:false,
 labelzIndex:130,
 pitch:40,
 zoom:9,
 layers:[
 new AMap.TileLayer.RoadNet({
 //rejectMapMask:true
 }),
 new AMap.TileLayer.Satellite()
 ]
 });
 var maskerIn = new AMap.Marker({
 position:[116.501415,39.926055],
 map:map
 })
 var maskerOut = new AMap.Marker({//区域外的不会显示
 position:[117.001415,39.926055],
 map:map
 })
 //添加描边
 for(var i =0;i<bounds.length;i+=1){
 new AMap.Polyline({
 path:bounds[i],
 strokeColor:'#99ffff',
 strokeWeight:4,
 map:map
 })
 }
 });
 </script>
</body>
</html>
 
 

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