National Spatial Reference System

The National Spatial Reference System, managed by the National Geodetic Survey, is a coordinate system that includes latitude, longitude, elevation, and other values. The NSRS consists of a National Shoreline, the NOAA CORS Network, 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 is a geodetic datum set produced by the U.S. National Geodetic Survey to improve the National Spatial Reference System. It will replace the North American Datum of 1983 and the North American Vertical Datum of 1988 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.