What are facts about meridian?

Answer 1

1. They are also called Lines of Longitude
2. They measure the angles east or west of the prime meridian
3. They run from the North Pole to the South Pole
4. Every meridian of longitude is the same length -- 1/2 of the Earth's polar circumference, roughly 12,410 miles.
5. All meridians of longitude meet at the north pole and at the south pole.
6. Every meridian of longitude crosses some part of Antarctica.

The key meridians are the Prime Meridian at 0 degrees and the 180th meridian (or anti-meridian) which is at 180 degrees east or west of the Prime Meridian.

The 'anti-meridian' is at both -180 degrees and +180 degrees on the map which is the same imaginary line where the east and west hemispheres meet. It joins the north and south poles, and runs through the Pacific Ocean.

Answer 2

A meridian is a line of longitude that specifies the east-west position of a point on the Earth's surface. In other words, the meridians are drawn from the North Pole to South Pole. A location's north-south position along a meridian is given by its latitude. The key meridians are the prime meridian at 0 degrees and the 180th meridian (or anti-meridian) which is at 180 degrees east or west of the prime meridian. The anti-meridian is at both -180 degrees and +180 degrees on the map, which is the same imagery line where the east and west hemispheres meet.

Some maps draw a line of longitude every 10 degrees and others every 15 degrees so depends on the map.