TSPI - National Geospatial-Intelligence Agency

The height above the ellipsoid (h) is an inseparable element of a geodetic 3D coordinate tuple. NOTE: Ellipsoidal height (h) differs from heights related to the geoid (H) by the amount by which the geoid undulates relative to the ellipsoid. geoid An equipotential surface of the Earth’s gravity field which is everywhere perpendicular to the ... ................
................