Grids - longitude

Eratosthenes created the first world map in 195 BC. Longitude is a geographic coordinate that specifies the east-west portion of a point on Earth's surface. Longitude is measured by imagery lines. Longitude is used to measure distance in degrees from east to west from the Prime Meridian. The Prime Meridian passes through Greenwhick, England, and is given the position of 0 degrees of longitude. The lines of longitude are also known as meridians. The lines of longitude run in a north-south direction. Also, the lines of longitude are equal in length.

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