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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
Millennium Tree Line (MTL)
Meridian Laser
Astronomers Royal
Telescopes used with Meridian Marks
 
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LocationEngland
Cambridgeshire
Somersham
High Street (outside No.91)
Distance (N) from Greenwich
OS map detailsOS Explorer: 225
OS grid refTL 36119.77936
(536119,277936)
WGS84 lat/long52.382547, -0.001509
TypePavement (slab)
Marking date1984
AccessUnrestricted