GIS坐标转换：WGS84至GCJ02至Web墨卡托

/*****查看轨迹*****/
function showRoute()
{
    require(["esri/map", "dojo/dom", "dojo/on",
                    "esri/layers/ArcGISDynamicMapServiceLayer",
                    "dojo/query", "esri/toolbars/draw",
                    "esri/symbols/SimpleLineSymbol", "esri/graphic", "esri/symbols/SimpleMarkerSymbol", "esri/symbols/SimpleFillSymbol", "dojo/domReady!"],
                function (Map, dom, on, ArcGISDynamicMapServiceLayer, query, Draw, SimpleLineSymbol, Graphic, SimpleMarkerSymbol, SimpleFillSymbol) {
                    //如果还没有加载地图，则重新加载地图
                    if (!map) {
                        LoadMap();
                    }
                    //创建绘图对象
                    var toolbar = new Draw(map, { showTooltips: true });
                    //定义绘制的点、线、面的样式
                    map.on("load", function () {
                        for (var i = 0; i < points.length; i++) {
                            var pointX = points[i].x;
                            var pointY = points[i].y;
                            //latLng2WebMercator(pointX, pointY);
                            var wgsXY = wgsToGc(pointX, pointY);
                            var latLngXY = latLng2WebMercator(wgsXY[0], wgsXY[1]);
                            ShowLocation(latLngXY[0], latLngXY[1]);
                        }

                        map.on("click", function (evt) {
                            alert("x:" + evt.mapPoint.x.toString() + " y:" + evt.mapPoint.y.toString());
                        });