Answer:
The geographic coordinate system uses latitude and longitude to describe absolute location.
Explanation:
The geographic coordinate system enables each position on the Earth to be specified by three coordinates of a spherical coordinate system arranged according to the Earth's axis. The three coordinates are longitude, latitude and elevation.
The Earth is not a sphere, but an irregularly changing shape resembling a rotary ellipsoid; the challenge is to define a coordinate system that can accurately determine each topographic characteristic as an unambiguous set of numbers.
