高德地图获取行政区域并且获取经纬度

news2024/12/23 7:49:07

我们的需求是获取行政图的切片图，需要四个角的经纬度代码如下

<!doctype html>
<html>

<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
    <title>拉框获取边界经纬度</title>
    <link rel="stylesheet" href="http://cache.amap.com/lbs/static/main1119.css" />
    <link rel="stylesheet" href="https://a.amap.com/jsapi_demos/static/demo-center/css/demo-center.css" />
    <!-- <script type="text/javascript">
        window._AMapSecurityConfig = {
          securityJsCode: "",
        }
      </script> -->

    <script src="http://webapi.amap.com/maps?v=1.4.15&key=&plugin=AMap.MouseTool,AMap.DistrictSearch"></script>
</head>
<style>
    html,
    body,
    #container {
        margin: 0;
        height: 100%;
    }

    .input-item-text {
        width: 7rem;
    }
</style>

<body>
    <div id="container"></div>
    <div class="input-card">
        <label style='color:grey'>行政区边界查询</label>
        <div class="input-item">
            <div class="input-item-prepend">
                <span class="input-item-text">行政级别</span>
            </div>
            <select id="level">
                <option value="district">district</option>
                <option value="city">city</option>
                <option value="province">province</option>
            </select>

        </div>
        <div class="input-item">
            <div class="input-item-prepend">
                <span class="input-item-text">名称/adcode</span>
            </div>
            <input id='district' type="text" value='泸溪县'>

        </div>
        <input id="draw1" type="button" class="btn" value="查询" />
    </div>
    <script>
        var map = new AMap.Map('container', {
            center: [110.21682, 28.2205],//地图中心点
            zoom: 10 //地图显示的缩放级别
        });
        var mouseTool = new AMap.MouseTool(map); //在地图中添加MouseTool插件
        var drawRectangle = mouseTool.rectangle(); //用鼠标工具画矩形
        AMap.event.addListener( mouseTool,'draw',function(e){ //添加事件
            console.log(e.obj.getPath());//获取路径
        });
        var district = null;
        var polygon;
        function drawBounds() {
            //加载行政区划插件
            if (!district) {
                //实例化DistrictSearch
                var opts = {
                    subdistrict: 0,   //获取边界不需要返回下级行政区
                    extensions: 'all',  //返回行政区边界坐标组等具体信息
                    level: 'district'  //查询行政级别为 市
                };
                district = new AMap.DistrictSearch(opts);
            }
            console.log(district)
            //行政区查询
            district.setLevel(document.getElementById('level').value)
            district.search(document.getElementById('district').value, function (status, result) {
                console.log(status, result)
                if (polygon) {
                    map.remove(polygon)//清除上次结果
                    polygon = null;
                }
                var bounds = result.districtList[0].boundaries;
                if (bounds) {
                    //生成行政区划polygon
                    for (var i = 0; i < bounds.length; i += 1) {//构造MultiPolygon的path
                        bounds[i] = [bounds[i]]
                    }
                   

                    polygon = new AMap.Polygon({
                        strokeWeight: 1,
                        path: bounds,
                        fillOpacity: 0.4,
                        fillColor: '#80d8ff',
                        strokeColor: '#0091ea'
                    });

                    map.add(polygon)
                    map.setFitView(polygon);//视口自适应
                }
            });
        }
        drawBounds();
        document.getElementById('draw1').onclick = drawBounds;
        document.getElementById('district').onkeydown = function (e) {
            if (e.keyCode === 13) {
                drawBounds();
                return false;
            }
            return true;
        };
    
    </script>
</body>

</html>

效果如下