Geodesic
The Great Circle
There are 180-meridians in the eastern hemisphere. The meridian through Greenwich, England, also called the Prime Meridian, was set at zero degrees of longitude. The meridian on the opposite side of the earth is 180-degrees.
Meridians of longitude; parallels of latitude. Remember that meridians are all the same length (20,000 km) and that they meet at the poles. Parallels are, well, parallel, and are different lengths, the longest being the Equator.
Meridians Meridians ;p
lines of longitude
Lines of longitudes are also called Meridians. These vertical lines are drawn from the North to South poles.The meridian through Greenwich, England, called the Prime Meridian, was set at zero degrees of longitude. The meridian on the opposite side of the earth from Greenwich is called the International Date Line (IDL), which is at roughly 180° longitude.
lines of longitude
meridians
degrees
Energy pathways
Parallels and meridians.
Meridians.