百度地图API 拖拽或点击地图位置获取坐标

 1     function setPlace(map,myValue,callback){ 2       function getAddress(){ 3         var pp = local.getResults().getPoi(0).point;    //获取第一个智能搜索的结果 4         map.centerAndZoom(pp, 18); 5         var marker = new BMap.Marker(pp);// 创建标注 6         map.addOverlay(marker);             // 将标注添加到地图中 7         marker.enableDragging();     // 可拖拽 8  9 10         marker.addEventListener('dragend', function (e) {//拖动标注结束11           var pointNew = e.point;12           console.log("使用拖拽获取的百度坐标"+pointNew.lng+","+pointNew.lat);13           marker.setPosition(pointNew);//设置覆盖物位置14           //百度转GCJ-0215           var x_pi = 3.14159265358979324 * 3000.0 / 180.0;16           var x = pointNew.lng - 0.0065;17           var y = pointNew.lat - 0.006;18           var z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi);19           var theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi);20           var gg_lng = z * Math.cos(theta);21           var gg_lat = z * Math.sin(theta);22           //百度GCJ02转web墨卡托8423           var earthRad = 6378137.0;24           pointNew.lng = gg_lng * Math.PI / 180 * earthRad;25           var a = gg_lat * Math.PI / 180;26           pointNew.lat = earthRad / 2 * Math.log((1.0 + Math.sin(a)) / (1.0 - Math.sin(a)));27           console.log("使用拖拽获取的百度坐标转换的WebMercator坐标是（"+pointNew.lng+","+pointNew.lat+")");28           return callback(pointNew);29         });30 31 32         map.addEventListener("click", function(e){33           console.log('换位置百度的经度:'+e.point.lng+' , 纬度: '+e.point.lat);34           var now_point =  new BMap.Point(e.point.lng, e.point.lat );35           marker.setPosition(now_point);//设置覆盖物位置36           var x_pi = 3.14159265358979324 * 3000.0 / 180.0;37           var x = now_point.lng - 0.0065;38           var y = now_point.lat - 0.006;39           var z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi);40           var theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi);41           var gg_lng = z * Math.cos(theta);42           var gg_lat = z * Math.sin(theta);43           //GCJ02转web墨卡托8444           var earthRad = 6378137.0;45           now_point.lng = gg_lng * Math.PI / 180 * earthRad;46           var a = gg_lat * Math.PI / 180;47           now_point.lat = earthRad / 2 * Math.log((1.0 + Math.sin(a)) / (1.0 - Math.sin(a)));48           console.log("WebMercator坐标是（"+now_point.lng+","+now_point.lat+")");49           return callback(now_point);50         });51         //百度转墨卡托52         console.log("使用点击换位置获取的百度坐标百度地图坐标是（"+pp.lng+","+pp.lat+")");53         //百度转GCJ-0254         var x_pi = 3.14159265358979324 * 3000.0 / 180.0;55         var x = pp.lng - 0.0065;56         var y = pp.lat - 0.006;57         var z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi);58         var theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi);59         var gg_lng = z * Math.cos(theta);60         var gg_lat = z * Math.sin(theta);61         //GCJ02转web墨卡托8462         var earthRad = 6378137.0;63         pp.lng = gg_lng * Math.PI / 180 * earthRad;64         var a = gg_lat * Math.PI / 180;65         pp.lat = earthRad / 2 * Math.log((1.0 + Math.sin(a)) / (1.0 - Math.sin(a)));66         console.log("使用点击换位置获取的百度坐标转换后的WebMercator坐标是（"+pp.lng+","+pp.lat+")");67         return callback(pp);68       }69 70       var local = new BMap.LocalSearch(map, { onSearchComplete: getAddress});71       local.search(myValue);72     }