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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)
The Millennium
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Astronomers Royal
Telescopes used with Meridian Marks
 
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LocationEngland
Hertfordshire
Nr Puckeridge
S side of: Mentley Lane West
Distance (N) from Greenwich
OS map detailsOS Explorer: 194
OS grid refTL 37606.23712
(537606,223712)
WGS84 lat/long51.894976, -0.001605
TypeTree | MTL?
Marking date2000?
AccessUnrestricted