What is longitude?

Imaginary lines called meridians that measure distances East and West of the Prime Meridian. Longitude is different from latitude. Longitude may also be referred to as meridians. Although they measure the distance from East and West, the lines run in the direction of north and south.

These lines are the ones that are farthest apart from the equator. They meet up at the North and South Poles. Lines of longitude are equal in length and have great circles in halves. On a map, we will only see a few lines, but the actual number that there are is endless.