Geographic coordinate system

Longitude lines are perpendicular to and latitude lines are parallel to the equator.

A geographic coordinate system is a coordinate system used in geography that enables every location on Earth to be specified by a set of numbers, letters or symbols.[n 1] The coordinates are often chosen such that one of the numbers represents a vertical position, and two or three of the numbers represent a horizontal position. A common choice of coordinates is latitude, longitude and elevation.[1]

To specify a location on a two-dimensional map requires a map projection.[2]
Cite error: There are <ref group=n> tags on this page, but the references will not show without a {{reflist|group=n}} template (see the help page).

  1. ^ A guide to coordinate systems in Great Britain (PDF), D00659 v2.3, Ordnance Survey, Mar 2015, retrieved 2015-06-22 
  2. ^ Taylor, Chuck. "Locating a Point On the Earth". Retrieved 4 March 2014. 

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