2008

NZ3669 : Benchmark, Colbeck Terrace

taken 16 years ago, near to Tynemouth, North Tyneside, England

Benchmark, Colbeck Terrace
Benchmark, Colbeck Terrace
Detail of the Ordnance Survey cut benchmark on the roadside wall beside the former Tynemouth Congregational Church. The benchmark marks a height of 30.325m above sea level (Ordnance Datum Newlyn) last verified in 1962 (location photograph NZ3669 : Churchyard Wall).
Ordnance Survey Benchmarks

The term benchmark, originates from the chiselled horizontal marks that surveyors made in stone structures, into which an angle-iron could be placed to form a "bench" for a levelling rod, thus ensuring that a levelling rod could be accurately repositioned in the same place in future. These marks were usually indicated with a chiselled arrow below the horizontal line.
The height of a benchmark is calculated relative to the heights of nearby benchmarks in a network extending from a fundamental benchmark, a point with a precisely known relationship to the level datum of the area, typically mean sea level. The position and height of each benchmark is shown on large-scale maps.


Creative Commons Licence [Some Rights Reserved]   © Copyright Adrian Taylor and licensed for reuse under this Creative Commons Licence.
This photo is linked from: Automatic Clusters: · Tynemouth Terrace [30] · Congregational Church [5] Other Photos: · Churchyard Wall ·
1:50,000 Modern Day Landranger(TM) Map © Crown Copyright
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1:50,000 Modern Day Landranger(TM) Map © Crown Copyright
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NZ3669, 351 images   (more nearby 🔍)
Photographer
Adrian Taylor   (more nearby)
Date Taken
Monday, 28 April, 2008   (more nearby)
Submitted
Saturday, 6 February, 2021
Subject Location
OSGB36: geotagged! NZ 3682 6936 [10m precision]
WGS84: 55:1.0459N 1:25.5421W
Camera Location
OSGB36: geotagged! NZ 3682 6936
View Direction
EAST (about 90 degrees)
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Image Type (about): close look 
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