投影转换

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   double locy = loc.getLatitude(); double locx = loc.getLongitude();
Point wgspoint = new Point(locx, locy);
Point mapPoint = (Point) GeometryEngine
.project(wgspoint,
SpatialReference.create(4326),
map.getSpatialReference());

//中点

 Envelope envelope = new Envelope();
graphic.getGeometry().queryEnvelope(envelope);
envelope.getCenter();

//投影转经纬度

SpatialReference sr4326 = SpatialReference.create(4326);

SpatialReference sr102100 = SpatialReference.create(102100);

Point point=(Point)graphic.getGeometry();
Point geometry=(Point)GeometryEngine.project(graphic.getGeometry(),sr102100, sr4326);
Geometry geometry1=GeometryEngine.project(b,graphic.getSpatialReference(), sr4326);
Point mapPoint = (Point) GeometryEngine.project(b, graphic.getSpatialReference(), sr4326);

投影转换

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原文地址：http://www.cnblogs.com/xiongxiaolang/p/5123451.html