File:WorldMapLongLat-eq-circles-tropics-non.png|thumb|440px|Map of [[Earth]] showing lines of [[latitude]] (horizontally) and [[longitude]] (vertically), Eckert VI projection; [https://www.cia.gov/library/publications/the-world-factbook/graphics/ref_maps/pdf/political_world.pdf large version] (pdf, 3.12MB)]]
A '''geographic coordinate system''' is a coordinate system that enables every location on the Earth to be specified by a set of numbers. The coordinates are often chosen such that one of the numbers represent vertical position, and two or three of the numbers represent horizontal position. A common choice of coordinates is latitude, longitude and ellipsoid height.
[[en:Geographic coordinate system]]