Ordnance Survey Benchmarks :: Shared Description

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.
by N Chadwick
Related descriptions Selection is automatic and approximate, it might not always select closely matching descriptions

93 images use this description. Preview sample shown below:

TQ7928 : Benchmark on Milestone, A268 by N Chadwick
TR0848 : Benchmark, Church of St Mary by N Chadwick
NZ8911 : Benchmark and lightning conductor by Adrian Taylor
NZ3568 : Flush Bracket Benchmark, Lower Rudyerd Street by Adrian Taylor
SK9824 : Round the back by Bob Harvey
TR1553 : Benchmark, Church of St Mary by N Chadwick
SJ9495 : Cut Benchmark, Manchester Road, Hyde by Gerald England
TQ6254 : Benchmark on Trig Pillar, Hurst Wood by N Chadwick
SJ9494 : A cut bench-mark on Tower Street, Hyde by Gerald England
SO8705 : Stone Stile, Bisley Road by Mr Red
NH6755 : OS benchmark in the outside wall of the walled garden, Rosehaugh Estate by Julian Paren
NZ3568 : Street corner, Lower Rudyerd Street by Adrian Taylor
NU1702 : Benchmark, Nelson Monument by Adrian Taylor
TQ5835 : Benchmark, Abergavenny Arms, Frant by N Chadwick
SJ4166 : Benchmark, City Rd by N Chadwick
TQ0486 : Benchmark, Church of St Mary by N Chadwick
NY2107 : Scafell Pike Trig point by N Chadwick
NZ2085 : Benchmark, Morpeth, St. George's Church by Adrian Taylor
NS8276 : Sauchierigg Farm (ruins) by Robert Murray
SJ9495 : Inverted cut benchmark by Gerald England
TR0434 : Benchmark, Church of St Peter and St Paul by N Chadwick
SX9392 : Benchmark, Lyndhurst Road, Exeter by David Smith
SJ9595 : What's on at The Sportsman by Gerald England
NZ3669 : Benchmark, Colbeck Terrace by Adrian Taylor
SZ5678 : Bracket, Triangulation pillar, Wroxall Down by N Chadwick

... and 68 more images.

These Shared Descriptions are common to multiple images. For example, you can create a generic description for an object shown in a photo, and reuse the description on all photos of the object. All descriptions are public and shared between contributors, i.e. you can reuse a description created by others, just as they can use yours.
Created: Mon, 22 Nov 2010, Updated: Mon, 7 Mar 2011

The 'Shared Description' text on this page is Copyright 2010 N Chadwick, however it is specifically licensed so that contributors can reuse it on their own images without restriction.

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