Meridian
This is an old revision of this page, as edited by BenDylan (talk | contribs) at 00:02, April 17, 2011. It may differ significantly from current revision.
A meridian is an imaginary arc connecting the north and South Pole of the Earth in a great circle. They connect all points on a single longitude.
The prime meridian is located in Greenwich, and is used to determine the coordinates of all the other meridians. The coordinates are measured in degrees, with 360 degrees making the entire Earth.