National Spatial Reference System

A survey marker (metal disk on square concrete pad) and commemorating plaque that is part of the NSRS.

The National Spatial Reference System (NSRS), managed by the National Geodetic Survey (NGS), is a coordinate system that includes latitude, longitude, elevation, and other values. The NSRS consists of a National Shoreline, the NOAA CORS Network (a system of Global Positioning System Continuously Operating Reference Stations), a network of permanently marked points, and a set of models that describe dynamic geophysical processes affecting spatial measurements. The system is based on the datums NAD 83 and NAVD 88.

The North American-Pacific Geopotential Datum of 2022 (NAPGD2022) is a geodetic datum set produced by the U.S. National Geodetic Survey to improve the National Spatial Reference System (NSRS). It will replace 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. In association with this release, a new, time-dependent geoid model, GEOID2022, will also be released. The release date for these models was planned for 2022 but they have been delayed.

See also

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

References

Attribution: contains public domain material copied from ngs.noaa.gov