前台脚本脚本转换

var geometryService = new esri.tasks.GeometryService("http://tasks.arcgisonline.com/ArcGIS/rest/services/Geometry/GeometryServer");

　　var incoord = 102100; //当前坐标系

　　var outcoord = 4326; //目标坐标系

　　var inSR = new esri.SpatialReference({wkid: incoord });

　　var outSR = new esri.SpatialReference({wkid: outcoord});

var inputpoint = new esri.geometry.Point(evt.mapPoint.x, evt.mapPoint.y, inSR);

var PrjParams = new esri.tasks.ProjectParameters();

PrjParams.geometries = [inputpoint];

PrjParams.outSR = outSR;

PrjParams.transformation = {wkid: parseInt(4326)}

geometryService.project(PrjParams, function (outputpoint) {

　　　　alert(经度："+outputpoint[0].x+",纬度："+ outputpoint[0].y);

　　});