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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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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
Greenwich Meridian Marker; England; Hertfordshire; Reed
North
North
All
South
South
Currently viewing images from 05 Mar 2005
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06 May 2018
15 Sep 2012
08 Aug 2009
07 Oct 2007
05 Mar 2005
28 May 2003

Standing virtually astride the Meridian, this 70 m high transmitter is visible for miles around. Over the years, it has changed ownership a number of times. At one point, it is believed to have carried the word Meridian in its name.