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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)
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Astronomers Royal
Telescopes used with Meridian Marks
 
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LocationFrance
Poitou-Charentes
Bardenac
Ferme du Haut-Bousson
Distance (S) from Greenwich
WGS84 lat/long45.303550, 0.000060
TypeSign on post(s)
Marking dateUnknown
AccessRestricted, but visible from road nearby