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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
The Quest for Longitude
International Meridian Conference (1884)
Meridian Day (1984)
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Telescopes used with Meridian Marks
 
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LocationEngland
Essex
Waltham Abbey
Abbey Gardens
Distance (N) from Greenwich
OS map detailsOS Explorer: 174
OS grid refTL 38235.00790
(538235,200790)
WGS84 lat/long51.688855, -0.001596
TypePavement (mosaic)
Marking dateBy 1996. Replaced 2013
AccessUnrestricted