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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
Hertfordshire
Reed
S side of: The Joint (Periwinkle Hill)
Distance (N) from Greenwich
OS map detailsOS Explorer: 194
OS grid refTL 37245.36456
(537245,236456)
WGS84 lat/long52.009574, -0.001763
TypeTransmitter
Marking dateUnknown
AccessNone, but visible from public road