File:Mynydd Cilan Triangulation Station - geograph.org.uk - 532236.jpg
Mynydd_Cilan_Triangulation_Station_-_geograph.org.uk_-_532236.jpg (640 × 480 pixels, file size: 69 KB, MIME type: image/jpeg)
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Summary
[edit]DescriptionMynydd Cilan Triangulation Station - geograph.org.uk - 532236.jpg |
English: Mynydd Cilan Triangulation Station English tourists gather round the Mynydd Cilan trig at 117m above sea level. Hell's Mouth Beach can be seen in the background.
Trig points were a tool to give surveyors a frame of reference for surveying the UK in the days before electronic positioning aids were available (GPS etc). Typically, a trig point is a concrete post set on a high point such as a hill with a metal disc inset in the top which you can put your theodolite in. The trig point is at an accurately surveyed and documented position so you can survey other stuff relative to one or more trig points. from www.jeremyp.net/trigpoint/ |
Date | |
Source | From geograph.org.uk |
Author | John Harvey |
Attribution (required by the license) InfoField | John Harvey / Mynydd Cilan Triangulation Station / |
InfoField | John Harvey / Mynydd Cilan Triangulation Station |
Camera location | 52° 47′ 14″ N, 4° 32′ 15″ W | View this and other nearby images on: OpenStreetMap | 52.787170; -4.537400 |
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Object location | 52° 47′ 17″ N, 4° 32′ 17″ W | View this and other nearby images on: OpenStreetMap | 52.788050; -4.538000 |
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Licensing
[edit]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 John Harvey and is licensed for reuse under the Creative Commons Attribution-ShareAlike 2.0 license.
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current | 20:29, 5 February 2011 | 640 × 480 (69 KB) | GeographBot (talk | contribs) | == {{int:filedesc}} == {{Information |description={{en|1=Mynydd Cilan Triangulation Station English tourists gather round the Mynydd Cilan trig at 117m above sea level. Hell's Mouth Beach can be seen in the background. Trig points were a tool to give |
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Structured data
Items portrayed in this file
depicts
52°47'13.81"N, 4°32'14.64"W
August 2007
52°47'16.98"N, 4°32'16.80"W
- Information field template with formatting
- Files with coordinates missing SDC location of creation (52° N, 5° W)
- CC-BY-SA-2.0
- Images from Geograph Britain and Ireland
- Images from Geograph Britain and Ireland missing SDC depicts
- Images from Geograph Britain and Ireland missing SDC location of creation
- Images from Geograph Britain and Ireland missing SDC MIME type
- Images by John Harvey