百度地圖API 拖拽或點擊地圖位置獲取坐標

    function setPlace(map,myValue,callback){
      function getAddress(){
        var pp = local.getResults().getPoi(0).point;    //獲取第一個智能搜索的結果
        map.centerAndZoom(pp, 18);
        var marker = new BMap.Marker(pp);// 創建標注
        map.addOverlay(marker);             // 將標注添加到地圖中
        marker.enableDragging();     // 可拖拽


        marker.addEventListener('dragend', function (e) {//拖動標注結束
          var pointNew = e.point;
          console.log("使用拖拽獲取的百度坐標"+pointNew.lng+","+pointNew.lat);
          marker.setPosition(pointNew);//設置覆蓋物位置
          //百度轉GCJ-02
          var x_pi = 3.14159265358979324 * 3000.0 / 180.0;
          var x = pointNew.lng - 0.0065;
          var y = pointNew.lat - 0.006;
          var z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi);
          var theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi);
          var gg_lng = z * Math.cos(theta);
          var gg_lat = z * Math.sin(theta);
          //百度GCJ02轉web墨卡托84
          var earthRad = 6378137.0;
          pointNew.lng = gg_lng * Math.PI / 180 * earthRad;
          var a = gg_lat * Math.PI / 180;
          pointNew.lat = earthRad / 2 * Math.log((1.0 + Math.sin(a)) / (1.0 - Math.sin(a)));
          console.log("使用拖拽獲取的百度坐標轉換的WebMercator坐標是（"+pointNew.lng+","+pointNew.lat+")");
          return callback(pointNew);
        });


        map.addEventListener("click", function(e){
          console.log('換位置百度的經度:'+e.point.lng+' , 緯度: '+e.point.lat);
          var now_point =  new BMap.Point(e.point.lng, e.point.lat );
          marker.setPosition(now_point);//設置覆蓋物位置
          var x_pi = 3.14159265358979324 * 3000.0 / 180.0;
          var x = now_point.lng - 0.0065;
          var y = now_point.lat - 0.006;
          var z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi);
          var theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi);
          var gg_lng = z * Math.cos(theta);
          var gg_lat = z * Math.sin(theta);
          //GCJ02轉web墨卡托84
          var earthRad = 6378137.0;
          now_point.lng = gg_lng * Math.PI / 180 * earthRad;
          var a = gg_lat * Math.PI / 180;
          now_point.lat = earthRad / 2 * Math.log((1.0 + Math.sin(a)) / (1.0 - Math.sin(a)));
          console.log("WebMercator坐標是（"+now_point.lng+","+now_point.lat+")");
          return callback(now_point);
        });
        //百度轉墨卡托
        console.log("使用點擊換位置獲取的百度坐標百度地圖坐標是（"+pp.lng+","+pp.lat+")");
        //百度轉GCJ-02
        var x_pi = 3.14159265358979324 * 3000.0 / 180.0;
        var x = pp.lng - 0.0065;
        var y = pp.lat - 0.006;
        var z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi);
        var theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi);
        var gg_lng = z * Math.cos(theta);
        var gg_lat = z * Math.sin(theta);
        //GCJ02轉web墨卡托84
        var earthRad = 6378137.0;
        pp.lng = gg_lng * Math.PI / 180 * earthRad;
        var a = gg_lat * Math.PI / 180;
        pp.lat = earthRad / 2 * Math.log((1.0 + Math.sin(a)) / (1.0 - Math.sin(a)));
        console.log("使用點擊換位置獲取的百度坐標轉換后的WebMercator坐標是（"+pp.lng+","+pp.lat+")");
        return callback(pp);
      }

      var local = new BMap.LocalSearch(map, { onSearchComplete: getAddress});
      local.search(myValue);
    }