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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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International Meridian Conference (1884)
Meridian Day (1984)
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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
Greenwich Meridian Marker; England; Hertfordshire; Nr Puckeridge
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Currently viewing images from 07 Oct 2007
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06 May 2018
15 Sep 2012
08 Aug 2009
07 Oct 2007
05 Mar 2005

At the time of the Millennium, the points where the Meridian crosses the roads of East Hertfordshire were marked by the planting of an oak tree. Not every road was marked, only ones like this, where a suitable site was available. A marker stone of about the same date is located on the opposite side of the road.