Section ranges are east or west measurements taken from a designated principal meridian, while township ranges are north or south measurements taken from a designated base line. The two measurements form a grid noting th... More » Geography Maps & Cartography

The Public Land Survey System publishes grid-like maps that break public lands down into 6-mile squares called townships, then subdivides each township into 36 1-mile squares called sections. Heavily populated sections a... More » Geography

"Township," "range" and "section" are terms used in the Public Land Survey System to designate the location of land in relation to a baseline and Principal Meridian. "Township," with a capital "T," refers to the location... More » Geography Maps & Cartography
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Halfway between the prime meridian and the 180-degree longitude line is a 90-degree longitude line. There are two 90-degree meridians (lines of longitude), one in each hemisphere. More » Geography Maps & Cartography

The city closest to the prime meridian is London. The prime meridian runs through the Royal Observatory in the town of Greenwich, which is in southeast London. More » Geography Maps & Cartography

The Prime Meridian passes through Greenwich, England. The original Royal Observatory, today's Flamsteed House, commemorates the establishment of the Prime Meridian with a museum and official denotations on the ground and... More » Geography Maps & Cartography

The prime meridian passes through the United Kingdom, France, Spain, Algeria, Mali, Burkina Faso, Ghana and Togo. The prime meridian represents the longitude of 0 degrees. More » Geography Maps & Cartography