Understanding Heights and Vertical Datums

Understanding Heights and Vertical Datums
national geodetic survey, benchmark, bench mark, survey mark, vertical datum, datum, standard datum, ellipsoidal datum, geopotential datum, tidal datum, ellipsoidal heights, gravity field, geoid, the geoid, geopotential, geopotential datum, orthometric, orthometric height, geoid undulation, dynamic height, elevation measurement, reference surface, NAVD88, NAVD 88, U.S. national spatial reference system, NSRS, GPS, GNSS, official U.S. datums, ellipsoid, ellipsoid height, U.S. Global Positioning System, Global Navigation Satellite Systems, World Geodetic System 1984, WGS 84, WGS84, earth gravitational model, gravity anomalies, equipotential, equipotential surface, gravity potential energy, geodetic leveling, local mean sea level, International Great Lakes Datum, IGLD, dynamic height datum, mean sea level, zero height surface, ocean dynamic topography, Mean Sea Level, local Mean Sea Level, MSL, Mean Low Water, MLW, Mean High Water, MHW, Metonic Cycle, National Tidal Datum Epoch, National Water Level Observation Network, NWLON, tide station, Center for Operational Oceanographic Products and Services, CO-OPS