Back Vertical datum English مبنای عمودی Persian Korkeusjärjestelmä Finnish Référent altimétrique French Datum vertikal ID Układ wysokościowy Polish Национальные системы высот в геодезии Russian
In geodesy, vertical datum or altimetric datum, is a coordinate surface used for vertical positions, such as the elevations of Earth-bound things, and altitudes of satellite orbits and in aviation.
