United States National Grid

United States National Grid

The United States National Grid, officially known as the United States National Grid for Spatial Addressing (USNG), is a system of geographic grid references commonly used in United States, different from using latitude or longitude. It is similar in design to the national grid reference systems used throughout other nations. The USNG was developed by the Federal Geographic Data Committee.


The purpose of the USNG, as defined by the DHS, is to "create a more interoperable environment for developing location-based services within the United States and to increase the interoperability of location services appliances with printed map products by establishing a nationally consistent grid reference system as the preferred grid for NSDI applications. The U.S. National Grid is based on universally-defined coordinate and grid systems and can, therefore, be easily extended for use world-wide as a universal grid reference system." [http://www.fgdc.gov/usng/usng/20050701_ESRIUser_USNGintro.pdf]

It resembles the Military Grid Reference System (MGRS). When the WGS84 datum is used, USNG and MGRS coordinates are practically identical.

In addition, it has the advantage of being easily plotted on USGS topographic maps by using a simple "left to right and then up" method instead of having to plot "backwards" from right to left when using latitude and longitude in the Western Hemisphere. The coordinates are also easily translated to distance as they are actually in meters. Thus the distance between two coordinates can quickly be determined in the field.

You can download USNG 1 km2 grid state-wide polygons for select states at http://mississippi.deltastate.edu. The site also gives more detailed information about the US National Grid.

See also

* British national grid reference system
* Irish national grid reference system


* FGDC, "United States National Grid (USNG)", December 2001, Reston, Virginia, [http://www.fgdc.gov/standards/projects/FGDC-standards-projects/usng/fgdc_std_011_2001_usng.pdf 1 megabyte PDF]

External links

* [http://www.fgdc.gov/usng USNG homepage]
* [http://www.fgdc.gov/usng/how-to-read-usng/index_html How to Read a United States National Grid (USNG) Spatial Address]
* [http://www.ngs.noaa.gov/cgi-bin/usng_getus.prl Utility to convert latitude and longitude to USNG]
* [http://www.fidnet.com/~jlmoore/usng Demonstration of USNG on a Google Map]

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • National Grid — Contents 1 Electric power transmission systems 2 Companies 3 Geosurvey 4 …   Wikipedia

  • United States Geological Survey — Seal Official …   Wikipedia

  • United States Cyber Command — U.S. Cyber Command emblem Active 2009–current Country …   Wikipedia

  • United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …   Universalium

  • United States emission standards — In the United States, emissions standards are managed on a national level by the Environmental Protection Agency (EPA). State and local governments play a subsidiary role. Contents 1 Motor vehicles 1.1 Light duty vehicles 1.1.1 Phase 1 1994 1999 …   Wikipedia

  • National Grid plc — Type Public limited company (LSE: NG., NYSE:  …   Wikipedia

  • United States Army Criminal Investigation Command — Abbreviation CID United States Army Criminal Investigation Command seal …   Wikipedia

  • United States Army — Wappen des Department of the Army Aufstellung 1789 …   Deutsch Wikipedia

  • National Broadband Plan (United States) — Connecting America: The National Broadband Plan, unveiled March 16, 2010,[1] is a FCC (Federal Communications Commission) plan which deals with improving broadband Internet access throughout the United States. One goal was providing… …   Wikipedia

  • United States Armed Forces — Streitkräfte der Vereinigten Staaten United States Armed Forces Führung …   Deutsch Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.