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

**Cartesian coordinates** - Coordinates that differ from latitude-longitude coordinates in that the latter comprise a spherical (rather than planar) reference system.

[Category=Geospatial ]

*Source: Open Geospatial Consortium, 03 June 2011 08:07:54, http://www.opengeospatial.org/ogc/glossary *

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**Cartesian coordinate system** - [coordinate systems] A two-dimensional, planar coordinate system in which horizontal distance is measured along an x-axis and vertical distance is measured along a y-axis. Each point on the plane is defined by an x,y coordinate. Relative measures of distance, area, and direction are constant throughout the Cartesian coordinate plane. The Cartesian coordinate system is named for the French mathematician and philosopher René Descartes (1596-1650).

[Category=Geospatial ]

*Source: esri, 10 February 2012 09:07:30, http://support.esri.com/en/knowledgebase/GISDictionary/term/abbreviation *

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