Latitude and longitude
McCarthy, Dennis D. Formerly, Time Service Division, U.S. Naval Observatory, Washington, DC.
Last reviewed:November 2019
- Astronomical coordinates
- Geodetic coordinates
- Geocentric coordinates
- Related Primary Literature
- Additional Reading
The latitude of a location specifies the angle between an imaginary line directed generally toward the center of the Earth and the Equator. The longitude measures the angle between the meridian (the plane defined by the Earth's axis and this local reference direction) and the plane of the Greenwich meridian (illus.a ).
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