Ordnance Survey Benchmark - Carmarthen, 1 Priory St.
Introduction
The photograph on this page of Ordnance Survey Benchmark - Carmarthen, 1 Priory St. by N Scott as part of the Geograph project.
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Ordnance Survey Benchmark - Carmarthen, 1 Priory St.
Image: © N Scott Taken: 2 Dec 2015
Ordnance Survey Benchmark (OSBM) used for levelling height above Ordnance Datum (OD). Height: 23.7700m OD (Newlyn). Mark verified by the Ordnance Survey in 1972. Description: BLDG NO1 PRIORY ST NW FACE W ANG. 0.5m above ground. 3rd Order BM. The wall has been incorporated into an extension to No.1 Priory St. The mark was included as a side level from Carmarthen FBM on the Carmarthen to Llandovery line of the Second Geodetic Levelling of England & Wales in 1913-1914. It was used on the Carmarthen to Abergavenny branch line (Carmarthen, Llanelly, Neath, Merthyr Tydfil & Abergavenny). It was levelled with a height of 77.999' above OD (Newlyn). Description: Old B.M. on wall, junction of St. Peter Street and Priory Street. Page 49 of the abstract: http://trigtools.co.uk/data/Abstract_0049.PNG Context: Image
Images are licensed for reuse under creativecommons.org/licenses/by-sa/2.0
Image Location
Latitude
51.858195
Longitude
-4.301997