double ossimTiledElevationDatabase::getHeightAboveEllipsoid(const ossimGpt& gpt) { double h = getHeightAboveMSL(gpt); if(h != ossim::nan()) { h += getOffsetFromEllipsoid(gpt); } return h; }
double ossimImageElevationDatabase::getHeightAboveEllipsoid(const ossimGpt& gpt) { double h = getHeightAboveMSL(gpt); if(!ossim::isnan(h)) { h += getOffsetFromEllipsoid(gpt); } return h; }