*Choose Index below for a list of all words and phrases defined in this glossary.*

**UTM Coordinate System (Universal Tranverse Mercator)** - A planar locational reference system which provides positional descriptions accurate to 1 meter in 2,500 across the entire earth`s surface except the poles. Based on the Universal Transverse Mercator map projection. At the poles, the Universal Polar Stereographic projection is used. The UTM system divides the earth`s surface into a grid in which each cell, excluding overlap with its neighbors, is 6 degrees east to west, and 8 degrees north to south (with the exception of the row from 72-84 degrees north latitude). For any position in the UTM grid, X-Y coordinates can be determined in eastings and northings. Eastings are in meters with respect to a central meridian drawn through the center of each grid zone (and given an arbitrary easting of 500,000 meters). In the northern hemisphere, northings are read in meters from the equator (0 meters). In the southern hemisphere, the equator is given the false northing of 10 million meters.

[Category=Geospatial ]

*Source: Open Geospatial Consortium, 10 July 2011 09:46:30, http://www.opengeospatial.org/ogc/glossary *

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**UTM** - [coordinate systems] Acronym for universal transverse Mercator. A projected coordinate system that divides the world into 60 north and south zones, 6 degrees wide.

[Category=Geospatial ]

*Source: esri, 24 September 2012 09:02:52, http://support.esri.com/en/knowledgebase/GISDictionary/term/abbreviation *

**Universal Transverse Mercator coordinate system (UTM)** - Universal Transverse Mercator (UTM) system is a specialized application of the Transverse Mercator projection. The globe is divided into 60 north and south zones, each spanning 6° of longitude. Each zone has its own central meridian. Zones 1N and 1S start at -180° W. The limits of each zone are 84° N and 80° S, with the division between north and south zones occurring at the equator. The polar regions use the Universal Polar Stereographic coordinate system.

The origin for each zone is its central meridian and the equator. To eliminate negative coordinates, the coordinate system alters the coordinate values at the origin. The value given to the central meridian is the false easting, and the value assigned to the equator is the false northing. A false easting of 500,000 meters is applied. A north zone has a false northing of zero, while a south zone has a false northing of 10,000,000 meters.

[Category=Geospatial ]

*Source: City of Toronto, 28 November 2013 08:51:06, http://www1.toronto.ca/wps/portal/contentonly?vgnextoid=7fdf38379bac0410VgnVCM10000071d60f89RCRD&vgnextfmt=default *

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