Hi,Iam using the below code osg::EllipsoidModel elipsModelObj; elipsModelObj.convertLatLongHeightToXYZ(12.9716,77.5946,500,x,y,z); But i checked the x,y,z values ... Thank you! Cheers, Rambabu ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=70076#70076