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What is the difference between a horizontal and a vertical datum?
What is the difference between a horizontal and a vertical date?
What is a geodetic vertical datum?
Which Vertical datums are used by professionals?
Referenced Ellipsoid. GEOID. Horizontal Datum : NAD83 , NAD83 (1986) , NAD27. Vertical Datum. Ellipsoidal Datums: NAD83 (HARN) , NAD83 (CORSxx) , NAD83 (NSRSxx) , NAD83 (PACPxx) , NAD83 (MARPxx) , ITRFxx , WGS84. Orthometric Datums: NAVD88 , NGVD29 , EGM2008 , EGM1996 , EGM1984. Tidal Datums: LMSL , MLLW , MLW , MHW , MHHW , DTL , MTL , LWD. IGLD85
Horizontal Datum : The North American Datum of 1983 (NAD83) Vertical Datum: Typically the North American Vertical Datum of 1988 (NAVD88), although the National Geodetic Vertical Datum of 1929 (NGVD29) and local reference datums are used in some areas outside of the conterminous United States.
A horizontal datum is used to measure a location across the Earth's surface, in latitude and longitude or another coordinate system; a vertical datum is used to measure the elevation or depth relative to a standard origin, such as mean sea level (MSL).
In geodesy, surveying, hydrography and navigation, vertical datum or altimetric datum is a reference coordinate surface used for vertical positions, such as the elevations of Earth-bound features ( terrain, bathymetry, water level, and built structures) and altitudes of satellite orbits and in aviation . In planetary science, vertical datums ...
Horizontal datums measure positions (latitude and longitude) on the surface of the Earth, while vertical datums are used to measure land elevations and water depths. The horizontal datum can be accessed and used through a collection of specific points on the Earth whose latitude and longitude have been accurately determined by NOAA's National ...
