What are longitude and latitude, and how are they used ?
Longitude: Imaginary lines that cross the surface of the Earth, running from north to south, measuring how far east or west of the prime meridian a place is located. Latitude: Imaginary lines that cross the surface of the Earth parallel to the Equator, measuring how far north or south of the Equator a place is located. (quoted from www.ed.gov/pubs/parents/Geogra phy/glossary.
