Keywords latitude, longitude, Earth, Prime Meridian, time zones, International Date Line, geography, location, measurement Email us at [email protected] if you have questions about the footage ...

After inventors created timepieces accurate enough to help navigators calculate their longitude, an international conference in 1884 officially established the prime meridian through Greenwich.

A line of longitude on maps called the Prime Meridian of the World has shifted 334 feet to the east, thanks to satellite measurements.