# National Spatial Reference System

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{{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](/source/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](/source/National_Geodetic_Survey) (NGS), is a coordinate system that includes [latitude](/source/latitude), [longitude](/source/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 Station](/source/Continuously_Operating_Reference_Station)s), 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](/source/NAD_83) and [NAVD 88](/source/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](/source/geodetic_datum) set produced by the U.S. [National Geodetic Survey](/source/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](/source/North_American_Datum_of_1983) (NAD 83) and the [North American Vertical Datum of 1988](/source/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.

==See also==
* [Altitude](/source/Altitude)
* [Sea Level Datum of 1929](/source/Sea_Level_Datum_of_1929)
* [Topographic elevation](/source/Topographic_elevation)
* [Topography](/source/Topography)
* [Reference ellipsoid](/source/Reference_ellipsoid)
* [Geoid](/source/Geoid)

== 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](/source/U.S._National_Geodetic_Survey)}}
* {{cite web |url=https://geodesy.noaa.gov/NCAT/ |title=Orthometric Height Conversion tool |publisher=[United States National Geodetic Survey](/source/U.S._National_Geodetic_Survey)}}

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Category:Geodesy
National Geodetic Survey

{{geodesy-stub}}

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Adapted from the Wikipedia article [National Spatial Reference System](https://en.wikipedia.org/wiki/National_Spatial_Reference_System) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/National_Spatial_Reference_System?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.