Hi, True. There is no problem with osgearth as it has well wrapped with projection information. I did not face any issue with that. But the samething when tried with OSG alone, i observed some issues. I put the pbm this way, suppose for given latitude and longitude as 11.0 and 77.0 (to be in radians) and to the resultant (x,y,z) of ellipsoid->converLatLonHtToXYZ(..), an object was attached. The object placement is not exactly over that latitude and longitude. It lies totally somewhere else on the globe. I think it is projection issue. Is anybody tried this out???
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