Category:Benchmarks in the United Kingdom
Jump to navigation
Jump to search
English: The vast majority of benchmarks in the United Kingdom have been placed by the Ordnance Survey. Bench marks are the visible remains of height measurements made by the Ordnance Survey. When used in conjunction with older Ordnance Survey maps they indicate the height above sea level at the point of the bench mark. The maps show a bench mark symbol, the letters BM (or B.M.) and the measured height above sea level. All heights are measured relative to the sea level measured at Newlyn in Cornwall. This is known as Ordnance Datum Newlyn, or more commonly ODN, which is the mean level of the sea at Newlyn, Cornwall. This was established using an automatic tide gauge, with measurements collected from the south pier between 1915 and 1921.
See also the Template {{Benchmark UK}}.
Constituent countries of the United Kingdom: England · Northern Ireland · Scotland · Wales – British Crown dependencies: the Bailiwick of Guernsey ≈ Bailiwick of Guernsey · the Isle of Man ≈ Isle of Man · Jersey
British overseas territories: Akrotiri and Dhekelia · Anguilla · Bermuda · the British Antarctic Territory ≈ British Antarctic Territory · the British Indian Ocean Territory ≈ British Indian Ocean Territory · the British Virgin Islands ≈ British Virgin Islands · the Cayman Islands ≈ Cayman Islands · the Falkland Islands ≈ Falkland Islands · Gibraltar · Montserrat · the Pitcairn Islands ≈ Pitcairn Islands · Saint Helena, Ascension and Tristan da Cunha · South Georgia and the South Sandwich Islands · the Turks and Caicos Islands ≈ Turks and Caicos Islands
British overseas territories: Akrotiri and Dhekelia · Anguilla · Bermuda · the British Antarctic Territory ≈ British Antarctic Territory · the British Indian Ocean Territory ≈ British Indian Ocean Territory · the British Virgin Islands ≈ British Virgin Islands · the Cayman Islands ≈ Cayman Islands · the Falkland Islands ≈ Falkland Islands · Gibraltar · Montserrat · the Pitcairn Islands ≈ Pitcairn Islands · Saint Helena, Ascension and Tristan da Cunha · South Georgia and the South Sandwich Islands · the Turks and Caicos Islands ≈ Turks and Caicos Islands
Subcategories
This category has the following 9 subcategories, out of 9 total.
E
N
O
S
W
Media in category "Benchmarks in the United Kingdom"
The following 3 files are in this category, out of 3 total.
-
Ordnance Survey Cut Mark - geograph.org.uk - 3928298.jpg 480 × 640; 56 KB
-
Rhymney St David - OS cut mark 5923193 89bb2004.jpg 680 × 1,024; 192 KB