In a geographic coordinate system, latitude and longitude
are used and are represented by two angles from the center of the
earth:
Latitude = south to north +90 or 90N
= north pole, -90 or 90S = south pole, and 0 is on the equator.
Longitude = east to west. 0 is in England.
In a geographic coordinate system the angular distance
is expressed in degrees and minutes, for example, New York:
A geographic coordinate system is defined by: