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Latitude and Longitude
Tower of London

What is the longitude of London?


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August 29, 2015 8:53AM

Difficult to explain without pictures, but here goes.... Imagine a circle drawn around the earth, from North to South and passing through both the North and South poles. This called a meridian, or Great Circle. A series of these circles can be drawn, each one being one degree apart, around the circle of the equator, and there would then be 360 such circles. The longitude of any place on earth is measured by how many degrees around is the meridian which passes through it. The starting point for this measurement could be anywhere on earth, but because of Britain's history as a major empire and sea power the starting point is in Greenwich, London. So, the longitude of Greenwich, London is 0 degrees.