National Spatial Reference System

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[1] (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. Pre-2022, the system is based on NAD 83 and NAVD 88.[2]

In 2022, the NSRS will be modernized with a focus on GNSS and geoid use. It will use the following four frames of reference, each representing a tectonic plate:[3][4]

  • North American Terrestrial Reference Frame of 2022 (NATRF2022)
  • Pacific Terrestrial Reference Frame of 2022 (PTRF2022)
  • Caribbean Terrestrial Reference Frame of 2022 (CTRF2022)
  • Mariana Terrestrial Reference Frame of 2022 (MTRF2022)

References
  1. "NGS - NCN Homepage". geodesy.noaa.gov. Retrieved 2022-04-19.
  2. "The National Spatial Reference System". National Geodetic Survey. Retrieved April 3, 2013.
  3. "How to Transition to the United States 2022 National Coordinate System Without Getting Left Behind" (PDF).
  4. Smith, Dru; Roman, Dan; Hilla, Steve. "NOAA Technical Report NOS NGS 62: Blueprint for 2022, Part 1: Geometric Coordinates" (PDF). National Geodetic Survey. Retrieved July 11, 2018.
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