ArcGIS Viewer for Flex 4326坐标系与12100坐标系坐标互转

1 定义以4326坐标系定位的地图

<esri:SpatialReference id="lo" wkid="4326" />

<esri:Map crosshairVisible="true" width="100%" height="100%" id="myMap" logoVisible="false">
        <esri:ArcGISTiledMapServiceLayer url="http://server.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer"/>
        
        <esri:GraphicsLayer id="EsriGraphicsLayer" spatialReference="{lo}" />
        
        <!-- 武汉视图 -->
        <esri:extent>
            <esri:Extent id="mapExtent" xmin="112.00" ymin="29.50" xmax="116.50" ymax="31.65" />
        </esri:extent>
    </esri:Map>

2 转换方法

public function init():void{
                //4326坐标转换为12100
                var geoExtent:Extent = WebMercatorUtil.geographicToWebMercator(myMap.extent) as Extent;
                myMap.extent = geoExtent;
            }