The placement of the prime meridian is a purely political decision.

They declared the Greenwich meridian the prime meridian of the world.

C. A. S. Totten, U.S.A., advocating a prime meridian through the great pyramid.

It was called Greenwich because it was positioned above Old Earth's prime meridian.

The second prime meridian begins at the mouth of Little Blue Creek, in Indiana.

A prime meridian is first determined, then a baseline crossing it at right angles.

The cosmic day consists of twenty-four hours, and commences at midnight of the prime meridian.

Ptolemy was free, however, to lay his prime meridian, the zero-degree longitude line, wherever he liked.

That from this prime meridian (the Greenwich meridian) longitude shall be counted in one direction.

Because of England's sustained support for achievements in astronomical and navigational measurements, Greenwich landed the prime meridian.

The first prime meridian has several base-lines.

The prime meridian runs through Greenwich, England, because that was the point arbitrarily chosen in the late nineteenth century.

The difference between the two is a direct measure of your longitude east or west of the prime meridian.

The first prime meridian starts at the mouth of the Great Miami and forms the western boundary of Ohio.

Such a catastrophe became more probable as the wind shifted more to the east after they passed the prime meridian.

This communication suggests that as the prime meridian passes through Havre, it should be allowable to call it by that name.