File:Bishopston Fundamental Benchmark - geograph.org.uk - 1384354.jpg
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Summary[edit]
| Description |
English: Bishopston Fundamental Benchmark One of the more important locators today - unlike most triangulation pillars, this is still of importance to the Ordnance Survey as a passive GPS station.
Underneath this small pillar, not far from bedrock is a concrete "coffin" containing both a metal stud and flint marker which have had their locations measured incredibly accurately in the past. These days, just the marker on the surface of the small pillar is now measured as part of the modern GPS survey. |
| Date | |
| Source | From geograph.org.uk |
| Author | Hywel Williams |
| Attribution (required by the license) | Hywel Williams / Bishopston Fundamental Benchmark / |
| Camera location |   | View this and other nearby images on: OpenStreetMap |  |
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| Object location | | View this and other nearby images on: OpenStreetMap | |
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Licensing[edit]
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This image was taken from the Geograph project collection. See this photograph's page on the Geograph website for the photographer's contact details. The copyright on this image is owned by Hywel Williams and is licensed for reuse under the Creative Commons Attribution-ShareAlike 2.0 license.
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This file is licensed under the Creative Commons Attribution-Share Alike 2.0 Generic license.
Attribution: Hywel Williams
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 17:48, 28 February 2011 | | 640 × 480 (135 KB) | GeographBot (talk | contribs) | == {{int:filedesc}} == {{Information |description={{en|1=Bishopston Fundamental Benchmark One of the more important locators today - unlike most triangulation pillars, this is still of importance to the Ordnance Survey as a passive GPS station. Underne |
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