5.让高德地图仅显示某一区域
高德地图自带掩摸功能可实现仅显示某一区域地图，可参考官方示例
实现效果如下
上图参考配置文件
<!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=1.4.15&key=您申请的key值&plugin=Map3D,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('天津市', 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', {
mapStyle: 'amap://styles/darkblue',
mask:mask,
center:[116.472804,39.995725],
disableSocket:true,
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
})
//添加高度面
var object3Dlayer = new AMap.Object3DLayer({zIndex:1});
map.add(object3Dlayer)
var height = -8000;
var color = '#0088ffcc';//rgba
var wall = new AMap.Object3D.Wall({
path:bounds,
height:height,
color:color
});
wall.transparent = true
object3Dlayer.add(wall)
//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>