Antimeridian And Prime Meridian |best|

While the Prime Meridian marks the beginning of the "map," the Antimeridian marks the transition between the Eastern and Western Hemispheres in the middle of the Pacific Ocean.

The starting point for measuring longitude. It runs through Greenwich, London , UK, and divides Earth into Eastern Hemisphere (0° to 180° east) and Western Hemisphere (0° to 180° west). antimeridian and prime meridian

This is where the International Date Line (IDL) mostly runs — but not exactly. The IDL zigzags around countries to keep them on the same calendar day. Without those zigzags, the antimeridian would split: While the Prime Meridian marks the beginning of