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Show/HideSearch Criteria: All Waymarks Within 100 km of N 46° 15.983 W 000° 37.583 [show search options]
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Greenwich Meridian Markers
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Description:
A category for marking signs or objects that mark, or claim to mark, the Greenwich Meridian
Expanded Description:
Waymarks for this category should be signs, objects or other markers that show the location of the Greenwich Meridian.

The Greenwich Meridian was redefined in 1936 by Airy, and is some 100 metres or so different from the WGS84 (from 1984) 0-degree longitude line that your GPS will report. As such, some markers of the Greenwich Meridian are in the wrong place! However, any object that claims to show the location of the world-splitting line is fine for this category.

Most markers in the UK are placed on the OSGB (Ordnance Survey Great Britain) 0-degree line, as most were replaced before GPS or the WGS84 datum were invented. With your waymark, the location should be recorded in the WGS84 co-ordinates with the OSGB as the additional co-ordinates (if the marker is in the UK) - it'll be interesting to see which markers lie on which line!

All waymarks should therefore be located within 1 minute of longitude from 0 degrees east/west. Photographic proof of the location of the waymark is required, including your GPS display in the photograph.
Instructions for Posting a Greenwich Meridian Markers Waymark:
All waymarks must be within 1 minute of longitude from 0 degrees east/west.

Photographic evidence of your visit and the location of the waymark (your GPS display in the photo) is also required.

You must post the WGS84 co-ordinates as the main location for the marker, but also list the co-ordinates in the OSGB datum as the additional co-ordinates (if the location is within the OSGB grid).
Instructions for Visiting a Waymark in this Category:
Photographic evidence must be provided of your visit, preferably with the GPS in shot with the screen readable.
Category Settings:
  • Waymarks can be added to this category
  • New waymarks of this category are reviewed by the category group prior to being published
  • Category is visible in the directory
Variables:
  • Co-ordinates in OSGB datum
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Image for cadran solaire - Melleran,Frview gallery

EE50.5 km

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Greenwich Meridian Markerscadran solaire - Melleran,Fr

in Greenwich Meridian Markers

The sundial is located on the merideien Greenwich Le cadran solaire est situé sur le merideien de Greenwich

posted by: Groundspeak Premium Member sara et gege

location: Nouvelle-Aquitaine, France

date approved: 2/2/2015

last visited: 4/6/2015

Image for Le meridien de Greenwich - Chalandray, Franceview gallery

NENE65 km

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Greenwich Meridian MarkersLe meridien de Greenwich - Chalandray, France

in Greenwich Meridian Markers

Le méridien de Greenwich passe par Chalandray dans la Vienne

posted by: Groundspeak Premium Member Zam's

location: Nouvelle-Aquitaine, France

date approved: 2/4/2018

last visited: 7/9/2016

Image for Meridian Marker, Saumur, Pays de Loire, Franceview gallery

NENE117.8 km

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Greenwich Meridian MarkersMeridian Marker, Saumur, Pays de Loire, France

in Greenwich Meridian Markers

[E] This marker is located beside the road D947 at the East of Saumur, Pays de Loire, France. [F] Cette borne se trouve sur la D947 à l'Est de Saumur.

posted by: Groundspeak Premium Member Chickilim

location: Pays de la Loire, France

date approved: 5/14/2014

last visited: 8/18/2019

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