Linked from

The 10 pages that link to Prime meridian, each with the reason it gives.

• LongitudeRelated: Longitude is measured east or west from this zero line.

• Geographic coordinate systemRelated: It establishes the reference from which longitude is measured.

• International Date LineRelated: The date line is conventionally positioned near the prime meridian’s antipode.

• Greenwich Mean TimeRelated: The Greenwich meridian became the internationally adopted zero-longitude reference.

• MeridianBroader topic: It supplies the reference needed to assign longitude to every other meridian.

• HemisphereRelated: Together with the 180th meridian, it defines the eastern and western hemispheres.

• 180th meridianRelated: The 180th meridian lies directly opposite this longitude reference.

• Eastern HemisphereRelated: It marks the western boundary of the Eastern Hemisphere.

• Land and water hemispheresCompared with: It anchors conventional east-west hemispheres, not the land-water division.

• Hemispheres of EarthRelated: Together with the 180th meridian, it defines the Eastern and Western Hemispheres.