地图上绘制多边形

根据输入的一组点的坐标,生成对应的封闭多边形。

实现代码

<!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>显示多边形</title>
        <link rel="stylesheet" href="http://cache.amap.com/lbs/static/main1119.css"/>
        <script src="http://webapi.amap.com/maps?v=1.3&key=5bc7ab8efc62334c67887ecd3c21a3a7"></script>
        <script type="text/javascript" src="http://cache.amap.com/lbs/static/addToolbar.js"></script>        
        <script src="http://code.jquery.com/jquery-latest.js"></script>
        <link rel="stylesheet" href="http://apps.bdimg.com/libs/bootstrap/3.3.0/css/bootstrap.min.css">
        <script src="http://apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js"></script>
        <script src="http://apps.bdimg.com/libs/bootstrap/3.3.0/js/bootstrap.min.js"></script>
        <script>
        $(document).ready(function(){
                var map;
                map = new AMap.Map('mapContainer', {
                    resizeEnable: true,
                    center: [116.397428, 39.90923],
                    zoom: 13
                });

                map.plugin(["AMap.ToolBar"],function(){
                    toolBar=new AMap.ToolBar();
                    map.addControl(toolBar);
                });

            function add_circle(x, y, color) {
                circle = new AMap.Circle({
                    center:new AMap.LngLat(x, y),
                    radius:10,
                    strokeColor: color,
                    strokeOpacity: 1,
                    strokeWeight: 3,
                    fillColor: color,
                    fillOpacity: 3
                });
                circle.setMap(map);
            }

            function add_marker(x, y, index){
                var marker = new AMap.Marker({ //添加自定义点标记
                    map: map,
                    position: [x, y], //基点位置
                    offset: new AMap.Pixel(-5, -5), //相对于基点的偏移位置
                    draggable: true,  //是否可拖动
                    content: "<p style='font-size:10px; color:blue'>"+index+"</p>"   //自定义点标记覆盖物内容
                });
                marker.setMap(map);
            }

            function add_polygon(polygonArr){
                var  polygon = new AMap.Polygon({
                    path: polygonArr,//设置多边形边界路径
                    strokeColor: "#FF33FF", //线颜色
                    strokeOpacity: 0.2, //线透明度
                    strokeWeight: 3,    //线宽
                    fillColor: "#1791fc", //填充色
                    fillOpacity: 0.35//填充透明度
                });
                polygon.setMap(map);
            }

            $('#show').click(function(){
                //map.clearMap();
                var polygonArr=new Array();
                var p;
                var points=$.parseJSON($('#content').val());

                add_circle(points[0][0]/1000000, points[0][1]/1000000, "red");

                for(var i=0;i<points.length;i++) {
                    p=points[i];
                    var x = p[0]/1000000;
                    var y = p[1]/1000000;
                    polygonArr.push([x, y]);
                    add_circle(x, y, 'blue');
                    add_marker(x, y, i);
                } 

                add_polygon(polygonArr);
                add_circle(p[0]/1000000, p[1]/1000000, "green"); 

                map.setZoomAndCenter(13, new AMap.LngLat(p[0]/1000000, p[1]/1000000));
            });                

        });
        </script>

        <style>
            #content {
                height: 600px;
                width: 100%;
            }
            #mapContainer {
                height: 600px;
            }
        </style>

    </head>
    <body>
        <div class="container">
            <div class="page-header">
                <h1>显示多边形</h1>
            </div>

            <div class="row">
                <div class="col-md-5">
                    <textarea id="content" placeholder="[[116530000,39540000],[116330000,39640000],[116510000,39840000],[116730000,39560000]]"></textarea>
                </div>
                <div class="col-md-7">
                    <div id="mapContainer"></div>
                </div>
            </div>
            <row class="row">
                <input type= "button" id="show" value="Show" class="btn btn-default col-md-1"/>
                <span class="text-danger col-md-6">红色为起点,绿色为终点,蓝色为中间结点,数字为结点编号</span>
            </row>

    </body>
</html>

实现效果

地图上绘制多边形

转载:http://blog.csdn.net/foreverling/article/details/50878079

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