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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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LocationEngland
Essex
Waltham Abbey
N side of: Sun Street (outside No.20a)
Distance (N) from Greenwich
OS map detailsOS Explorer: 174
OS grid refTL 38248.00566
(538248,200566)
WGS84 lat/long51.686839, -0.001497
TypePavement (slab)
Marking dateMay 1983
AccessUnrestricted. Mark no longer present