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“Bite-Size Bits of Local, National, and Global History”
Royal Borough of Greenwich in Greater London County, England, United Kingdom
 

Ordnance Survey Bench Mark

Public Standards of Length

 
 
Ordnance Survey Bench Mark Marker image. Click for full size.
By Michael Herrick, April 28, 2018
1. Ordnance Survey Bench Mark Marker
Inscription.
Ordnance Survey Bench Mark
The small plate (marked ‘G1692’) is an Ordnance Survey bench mark. Similar marks appear on walls and buildings across the country. The height of each above sea level has been measured and recorded. Dating from the 1940s, this particular mark is a replacement for an older mark that once existed nearby.

Public Standards of Length
These British Imperial Standards were first mounted outside the Observatory main gates some time before 1866, to enable the public to check measures of length.

The stated length is the distance between the inner faces of the two D-shaped studs.
 
Location. 51° 28.681′ N, 0° 0.083′ W. Marker is in Royal Borough of Greenwich, England, in Greater London County. Marker can be reached from the intersection of Blackheath Avenue and Great Cross Avenue, on the left when traveling north. Touch for map. Located at the Royal Observatory Greenwich. Marker is in this post office area: Royal Borough of Greenwich, England SE10 8XJ, United Kingdom.
 
Other nearby markers. At least 8 other markers are within walking distance of this marker. The Shepherd 24-hour Gate Clock (here, next to this marker); Greenwich Meridian Marker, 1750-1851 (a few steps from this marker); Time for everyone
Ordnance Survey Bench Mark Marker image. Click for full size.
By Michael Herrick, April 28, 2018
2. Ordnance Survey Bench Mark Marker
Next to the marker is the Ordnance Survey Bench Mark. Below are the Public Standards of Length.
(a few steps from this marker); Airy’s meridian line (a few steps from this marker); The Greenwich Meridian Telescope (a few steps from this marker); Bradley’s meridian line (a few steps from this marker); Family Tombstone of Edmund Halley (within shouting distance of this marker); Flamsteed’s Well Telescope (within shouting distance of this marker). Touch for a list and map of all markers in Royal Borough of Greenwich.
 
Also see . . .  Royal Observatory, Greenwich on Wikipedia. (Submitted on May 24, 2018, by Michael Herrick of Southbury, Connecticut.)
 
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Credits. This page was last revised on May 24, 2018. This page originally submitted on May 24, 2018, by Michael Herrick of Southbury, Connecticut. This page has been viewed 53 times since then. Photos:   1, 2. submitted on May 24, 2018, by Michael Herrick of Southbury, Connecticut.
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