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Royal Observatory Greenwich
Latitude and Longitude
Airy Transit Circle (ATC)
WGS84 and the Greenwich Meridian
The Greenwich Meridian before the ATC
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International Meridian Conference (1884)
Meridian Day (1984)
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LocationEngland
West Sussex
East Grinstead
N side of: Lynton Park Avenue
Distance (S) from Greenwich
OS map detailsOS Explorer: 135
OS grid refTQ 39924.38847
(539924,138847)
WGS84 lat/long51.131813, -0.001598
TypeMarker 'stone'
Marking date2000
AccessUnrestricted