Ordnance Survey Benchmark - Carmarthen, Picton's Monument
Introduction
The photograph on this page of Ordnance Survey Benchmark - Carmarthen, Picton's Monument by N Scott as part of the Geograph project.
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Ordnance Survey Benchmark - Carmarthen, Picton's Monument
Image: © N Scott Taken: 8 Oct 2013
Ordnance Survey Benchmark (OSBM) used for levelling height above Ordnance Datum (OD). Height: 30.2588m OD (Newlyn). Mark verified by the Ordnance Survey in 1976. Description: WALL NE ANG PICTON MON N FACE. 0.5m above ground. 3rd Order BM. The mark was used on the Llanstephan to Dolfor Toll-house line of the First Primary Levelling of England & Wales in 1856-1857. It was levelled with a height of 99.615' above OD (Liverpool). Description: 17. Mark on base of railing enclosing Picton's Monument ; 2.07 ft. above surface. Page 576 of the abstract: http://www.bench-marks.org.uk/ew1gl/1GLA_576.png Close=up: Image
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Image Location
Latitude
51.855219
Longitude
-4.320724