Related terms:
utc
datum
spheroid
ellipsoid
meridian
flattening
longitude
pole
greenwich
mean
latitude
royal observatory
zero
americas
observatory
coordinates
metres
rotation
astronomical
seconds
satellite
earth
paris
Wikipedia sources:
Prime Meridian
Longitude
Royal Observatory, Greenwich
Meridian (geography)
Indian Standard Time
World Geodetic System
History of cartography
Eurocentrism
Rose Line
Western Hemisphere
Context for words:
prime
meridian
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