W
E for East longitude.
Longitudes west of the prime meridian are given either as "40 degrees W" or "-40 degrees", with degrees represented by the "o" degree symbol.
The name of the meridian that is labeled 0 is the Prime Meridian.
Prime meridian
The Prime Meridian effectively divides the continent of Antarctica in half. Since prime meridians are arbitrary this is based on the Greenwich Prime Meridian.
The Prime Meridian The International Date Line
Vertical lines parallel to the prime meridian are lines of longitude.
The Prime Meridian and the International Date Line
The Prime or Greenwich meridian. 0 degrees longitude
I am not sure, but i think it is the prime meridian, pretty sure i am not right
Prime or Greenwich.
The longitude of every point on the Prime Meridian is zero.