百度地图开发：根据指定手绘图纸照片行政区划自定义绘制对应区域边界生成geoJOSN的解决方案

    <script type="text/javascript"
            src="http://api.map.baidu.com/api?v=3.0&ak=你的AK"></script>

<div id="main">
    <div id="img"><img src="images/lll.png" alt=""></div>
    <div id="container"></div>
</div>
<div id="text"><input id="startBtn" type="button" onclick="startTool();" value="开启取点"/>
    <input type="button" onclick="map.clearOverlays();document.getElementById('info').innerHTML = '';points=[];"
           value="清除"/>
</div>
<div id="info">坐标：</div>

  body, html {
            width: 100%;
            height: 100%;
            margin: 0;
            font-family: "微软雅黑";
        }
        #main {
            position: relative;
        }
        #img {
            position: absolute;
            opacity: 0.5;
            left: 500px;
            top: 200px;
            z-index: -999;
        }
        #container {
            width: 100%;
            height: 80vh;
            border: 1px solid gray;
            position: absolute;
            opacity: 0.7;
            z-index: 9999;
        }
        #text {
            position: absolute;
            z-index: 9999;
            left: 50px;
            bottom: 120px;
        }
        #info {
            position: absolute;
            z-index: 999999;
            left: 50px;
            bottom: 80px;
        }

var map = new BMap.Map("container", {enableMapClick: false});
    map.centerAndZoom(new BMap.Point(112.761393, 28.101516), 18);
    map.enableScrollWheelZoom();
    /*设置版权控件位置 -Begin*/
    var cr = new BMap.CopyrightControl({anchor: BMAP_ANCHOR_TOP_RIGHT});
    map.addControl(cr); //添加版权控件
    var bs = map.getBounds();   //返回地图可视区域
    cr.addCopyright({
        id: 1,
        content: "<div style='font-size:12px;margin: 10px;padding:5px;background: rgba(255,255,255,.8);'>Copyright © 漏刻有时百度地图API开发</div>",
        bounds: bs
    });
    /*设置版权控件位置 -End*/
    var key = 1;    //开关
    var newpoint;   //一个经纬度
    var points = [];    //数组，放经纬度信息
    var polyline = new BMap.Polyline(); //折线覆盖物
    function startTool() {   //开关函数
        if (key == 1) {
            document.getElementById("startBtn").style.background = "green";
            document.getElementById("startBtn").style.color = "white";
            document.getElementById("startBtn").value = "开启状态";
            key = 0;
        }
        else {
            document.getElementById("startBtn").style.background = "red";
            document.getElementById("startBtn").value = "关闭状态";
            key = 1;
        }
    }
    //单击地图，形成折线覆盖物
    map.addEventListener("click", function (e) {
        newpoint = new BMap.Point(e.point.lng, e.point.lat);
        if (key == 0) {
            //    if(points[points.length].lng==points[points.length-1].lng){alert(111);}
            points.push(newpoint);  //将新增的点放到数组中
            polyline.setPath(points);   //设置折线的点数组
            map.addOverlay(polyline);   //将折线添加到地图上
            /*02.数据集格式*/
            document.getElementById("info").innerHTML += "[" + e.point.lng + "," + e.point.lat + "],";
        }
    });
    //双击地图，形成多边形覆盖物
    map.addEventListener("dblclick", function (e) {
        if (key == 0) {
            map.disableDoubleClickZoom();   //关闭双击放大
            var polygon = new BMap.Polygon(points);
            map.addOverlay(polygon);   //将折线添加到地图上
        }
    });

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "LineString",
        "coordinates": [
          [
            112.7584914732037,
            28.10156777873837
          ],
          [
            112.759075371785,
            28.1008667598055
          ],
          [
            112.76014435534152,
            28.10005420934206
          ],
          [
            112.76070130475752,
            28.10014183763234
          ],
          [
            112.76055757587598,
            28.10128099882524
          ],
          [
            112.76028808422306,
            28.101519982139973
          ],
          [
            112.7585094393139,
            28.101599643125347
          ]
        ]
      }
    }
  ]
}