National Spatial Reference System

{{Short description|NAD 83 & NAVD 88 based National Geodetic Coordinate System}} {{Use American English|date=January 2026}} {{Use mdy dates|date=December 2025}} [[File:Chamberlain2 (cropped).jpg|thumb|A survey marker (metal disk on square concrete pad) and commemorating plaque that is part of the NSRS.<ref name="f831">{{cite web |title=News: Lewis & Clark |website=NGS/NOAA |date=September 24, 2004 |url=https://www.ngs.noaa.gov/LewisAndClark/ChamberlainSD.html | access-date=November 20, 2025}}</ref><ref>{{cite web |url=https://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=DH4418 |title=NGS Datasheet for marker DH4418 @ Chamberlain, SD}}</ref>]]

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<ref>{{Cite web |title=NGS - NCN Homepage |url=https://geodesy.noaa.gov/CORS/ |access-date=April 19, 2022 |website=geodesy.noaa.gov |language=EN-US}}</ref> (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.<ref name=onepager>{{cite web |url=http://www.ngs.noaa.gov/INFO/OnePagers/NSRS.html |title=The National Spatial Reference System |publisher=National Geodetic Survey |accessdate=April 3, 2013}}</ref>

{{Geodesy}} 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).<ref>{{cite web |title=Updated Implementation Timeline for the Modernized National Spatial Reference System (NSRS) |url=https://www.federalregister.gov/documents/2024/10/09/2024-23347/updated-implementation-timeline-for-the-modernized-national-spatial-reference-system-nsrs |website=Federal Register |access-date=November 20, 2024 |language=en |date=October 9, 2024}}</ref><ref>{{Cite web |title=Delayed Release of Modernized NSRS, New Datums |url=https://geodesy.noaa.gov/datums/newdatums/delayed-release.shtml |access-date=February 1, 2022 |website=geodesy.noaa.gov |language=EN-US}}</ref><ref>{{Cite web |title=Frequently Asked Questions - FAQ - New Datums - National Geodetic Survey |url=https://geodesy.noaa.gov/datums/newdatums/FAQNewDatums.shtml |access-date=February 1, 2022 |website=geodesy.noaa.gov |language=EN-US}}</ref> 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.<ref name="NEW22">{{Cite web |title=New Datums - National Geodetic Survey |url=https://www.ngs.noaa.gov/datums/newdatums/index.shtml|access-date=February 1, 2022 |website=www.ngs.noaa.gov |language=EN-US}}</ref> In association with this release, a new, time-dependent geoid model, '''GEOID2022''', will also be released.<ref>{{Cite web |title=Naming Convention - New Datums - National Geodetic Survey |url=https://geodesy.noaa.gov/datums/newdatums/naming-convention.shtml |access-date=April 16, 2024 |website=geodesy.noaa.gov |language=EN-US}}</ref> The release date for these models was planned for 2022 but they have been delayed.

== References == ''Attribution'': contains public domain material copied from [https://www.ngs.noaa.gov/datums/newdatums/index.shtml ngs.noaa.gov] {{reflist}}

==External links== * {{cite web |last=Doyle |first=David R. |url=http://www.ngs.noaa.gov/PUBS_LIB/develop_NSRS.html |title=Development of The National Spatial Reference System |publisher=National Geodetic Survey}} * {{cite web |url=http://www.usgs.gov/ |title=United States Geological Survey home page}} * {{cite web |url=http://www.ngs.noaa.gov/ |title=U.S. National Geodetic Survey home page}} * {{cite web |url=http://www.ngs.noaa.gov/CORS-Proxy/Glossary/xml/NGS_Glossary.xml |title=Geodetic Glossary |publisher=United States National Geodetic Survey}} * {{cite web |url=https://geodesy.noaa.gov/NCAT/ |title=Orthometric Height Conversion tool |publisher=United States National Geodetic Survey}}

Category:Geodesy National Geodetic Survey