Meridian

Difference Between True Meridian and Arbitrary Meridian
¤ Generally, arbitrary meridian is used to determine relative directions, whereas true meridian is used to determine absolute directions. ¤ Arbitrary ...
Difference Between True Meridian and Magnetic Meridian
The true meridian is the chord that goes from one pole to the other, passing through the observer, and is contrasted with the magnetic meridian, which...