Datum of 2022

Geodesy

Fundamentals

* Geodesy
* Geodynamics
* Geomatics
* History

Concepts

* Geographical distance
* Geoid
* Figure of the Earth (Earth radius and Earth's circumference)
* Geodetic datum
* Geodesic
* Geographic coordinate system
* Horizontal position representation
* Latitude / Longitude
* Map projection
* Reference ellipsoid
* Satellite geodesy
* Spatial reference system
* Spatial relations

Technologies

* Global Nav. Sat. Systems (GNSSs)
* Global Pos. System (GPS)
* GLONASS (Russia)
* BeiDou (BDS) (China)
* Galileo (Europe)
* NAVIC (India)
* Quasi-Zenith Sat. Sys. (QZSS) (Japan)
* Discrete Global Grid and Geocoding

Standards (history)

|  NGVD 29|  Sea Level Datum 1929

|

OSGB36|  Ordnance Survey Great Britain 1936
SK-42|  Systema Koordinat 1942 goda
ED50|  European Datum 1950
SAD69|  South American Datum 1969
GRS 80|  Geodetic Reference System 1980
ISO 6709|  Geographic point coord. 1983
NAD 83|  North American Datum 1983
WGS 84|  World Geodetic System 1984
NAVD 88|  N. American Vertical Datum 1988
ETRS89|  European Terrestrial Ref. Sys. 1989
GCJ-02|  Chinese obfuscated datum 2002
Geo URI|  Internet link to a point 2010

* International Terrestrial Reference System
* Spatial Reference System Identifier (SRID)
* Universal Transverse Mercator (UTM)

* v
* t
* e

The Datum of 2022 is a placeholder name for a new vertical datum set to be produced by the National Geodetic Survey in 2022 to improve the National Spatial Reference System (NSRS) by replacing the North American Datum of 1983 (NAD 83) and the North American Vertical Datum of 1988 (NAVD 88) with a new geometric reference frame and geopotential datum.[1]

The new reference frames will rely primarily on Global Navigation Satellite Systems (GNSS), such as the Global Positioning System (GPS), as well as on a gravimetric geoid model resulting from NGS' Gravity for the Redefinition of the American Vertical Datum (GRAV-D) Project.

These new reference frames are intended be easier to access and to maintain than NAD 83 and NAVD 88, which rely on physical survey marks that deteriorate over time.[1]

## See also

* Altitude
* Geodesy
* Sea Level Datum of 1929
* Topographic elevation
* Topography
* Reference ellipsoid
* Geoid

## References

1. ↑ 1.0 1.1 New Datums: Replacing NAVD 88 and NAD 83

## External links

* "United States Geological Survey home page". http://www.usgs.gov/.
* "U.S. National Geodetic Survey home page". http://www.ngs.noaa.gov/.
* "Geodetic Glossary". United States National Geodetic Survey. http://www.ngs.noaa.gov/CORS-Proxy/Glossary/xml/NGS_Glossary.xml.
* "Orthometric Height Conversion tool". United States National Geodetic Survey. http://www.ngs.noaa.gov/cgi-bin/VERTCON/vert_con.prl.

attribution contains public domain material copied from https://www.ngs.noaa.gov/datums/newdatums/index.shtml

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