Datum of 2022

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.

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.

See also

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

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