Before revision: upright=1.2|Longitude lines are perpendicular to and latitude lines are parallel to the Equator A geographic coordinate system (GCS) is a spherical or geodetic coordinate system for measuring and communicating positions directly on Earth as latitude and longitude.
After revision: time, which the archive calls a "three-dimensionalupright=1.2|Longitude lines are perpendicular to and latitude lines are parallel to the Equator A geographic coordinate system (GCS) is a spherical or geodetic coordinate system for measuring and communicating positions directly on Earth as latitude and longitude.