SJ9495 : Inverted cut benchmark

taken 1 year ago, near to Hyde, Tameside, Great Britain

Inverted cut benchmark
Inverted cut benchmark

The wall of the bridge over the Peak Forest Canal SJ9495 : Manchester Road canal bridge wall. carries an inverted bench mark. The wall must have been rebuilt at some time.

Benchmark database: LinkExternal link
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.
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SJ9495, 780 images   (more nearby )
Photographer
  (find more nearby)
Date Taken
Monday, 24 October, 2016   (more nearby)
Submitted
Sunday, 7 May, 2017
Geographical Context
Historic sites and artefacts 
Subject Location
OSGB36: geotagged! SJ 9434 9510 [10m precision]
WGS84: 53:27.1576N 2:5.2018W
Camera Location
OSGB36: geotagged! SJ 9434 9511
View Direction
Southeast (about 135 degrees)
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Other Tags
Bench-Mark 

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Image Type (about): close look 
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