File:Equator_and_Prime_Meridian.svg · Wikimedia Commons · See Wikimedia Commons
prime meridian
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line of longitude, at which longitude is defined to be 0°
The prime meridian is an imaginary line running around Earth where longitude is set at 0°, serving as the reference point from which all other longitudes are measured east and west. It matters because it provides a standardized way for people worldwide to specify locations on a map and coordinate activities that depend on knowing exact positions.
AI-generated from the Wikipedia summary — may contain errors.
~17 min read
Encyclopedic overview
0°
Modern IERS Reference Meridian on Earth (interactive map)
Excerpted from Wikipedia’s “prime meridian” article, available under the CC BY-SA 4.0 licence.
Gallery (12)
On the map
37 mapped locations