File:Benchmark, Omagh - geograph.org.uk - 602294.jpg
No higher resolution available.
Benchmark,_Omagh_-_geograph.org.uk_-_602294.jpg (640 × 480 pixels, file size: 103 KB, MIME type: image/jpeg)
Captions
Captions
Add a one-line explanation of what this file represents
Summary edit
| Description |
English: Benchmark, Omagh Located on the stone wall about half-way across Bell's Bridge which joins Bridge Street with Mountjoy Road.
Levelling was first carried out as a national project in 1840 and continued until 1980's, where the levelling network as basically abandoned in favour of GPS methods. Benchmarks are various marks made by the Ordnance Survey to record height. If the exact height of one Benchmark is known then the exact height of the next can be found by measuring the difference in heights, through a process of spirit levelling. |
| Date | |
| Source | From geograph.org.uk |
| Author | Kenneth Allen |
| Attribution (required by the license) | Kenneth Allen / Bench mark, Omagh / |
| Camera location |   | View this and other nearby images on: OpenStreetMap |  |
|---|
_heading:90.00&language=en){kind=link}
| Object location | | View this and other nearby images on: OpenStreetMap | |
|---|
_heading:90.00&language=en){kind=link}
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 Kenneth Allen and is licensed for reuse under the Creative Commons Attribution-ShareAlike 2.0 license.
|
This file is licensed under the Creative Commons Attribution-Share Alike 2.0 Generic license.
Attribution: Kenneth Allen
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 22:31, 6 February 2011 | | 640 × 480 (103 KB) | GeographBot (talk | contribs) | == {{int:filedesc}} == {{Information |description={{en|1=Benchmark, Omagh Located on the stone wall about half-way across Bell's Bridge which joins Bridge Street with Mountjoy Road. Levelling was first carried out as a national project in 1840 and conti |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
