超图FAQ: 两种方法:
1、UGPrjCoordSys *prjsys=new UGPrjCoordSys();
prjsys->SetTypeID(PCS_WGS_1984_WORLD_MERCATOR);
UGGeoPoint *point=new UGGeoPoint();
point->SetX(120);
point->SetY(40);
point->PJForward(prjsys);
2、UGPoint2D *point2D=new UGPoint2D(120,40);
prjsys->Forward(point2D,1);