While satellite positioning with GPS (or related GNSS methods) provides ellipsoidal heights , terrestrial leveled , i.e. orthometric, heights refer to the geoid . The combination of both methods on one and the same route therefore means a geoid determination that achieves an accuracy of a few centimeters along this profile:
GPS leveling is therefore suitable for large-scale control of a geoid project as well as for limiting error propagation in larger elevation networks . The spatial resolution is limited to about 30 to 50 km - depending on the mesh size of the precision leveling element. Because the denser technical leveling is not on a par with a GPS altitude determination in terms of accuracy from distances of more than 10 km.
- GPS leveling: method, functionality & areas of application. Retrieved February 27, 2015 .