2016
SN4257 : Ordnance Survey Benchmark and Bolt - Llanarth, St. David's Church
taken 9 years ago, near to Llanarth, Ceredigion/Sir Ceredigion, Wales
This is 1 of 2 images, with title Ordnance Survey Benchmark and Bolt - Llanarth, St. David's Church in this square
Ordnance Survey Benchmark and Bolt - Llanarth, St. David's Church
Ordnance Survey Benchmark (OSBM) used for levelling height above Ordnance Datum (OD).
Height (1975): 131.8946m OD. Mark verified by the Ordnance Survey in 1975. Description: PA BOLT ST DAVIDS CH W FACE 2.8M SW ANG. 0.3m above ground. 3rd Order BM.
The bolt was included as a branch level from mark 683 on the Warrington to Pembroke Docks line of the First Primary Levelling of England & Wales in 1851-1852. It was levelled with a height of 432.622' above OD (Liverpool). Description: Llanarth Church. Bolt in West side of tower ; 1.51 ft. above surface. Page 535 of the abstract: Link
(Archive Link )
Context: SN4257 : Ordnance Survey Benchmark and Bolt - Llanarth, St. David's Church
Height (1975): 131.8946m OD. Mark verified by the Ordnance Survey in 1975. Description: PA BOLT ST DAVIDS CH W FACE 2.8M SW ANG. 0.3m above ground. 3rd Order BM.
The bolt was included as a branch level from mark 683 on the Warrington to Pembroke Docks line of the First Primary Levelling of England & Wales in 1851-1852. It was levelled with a height of 432.622' above OD (Liverpool). Description: Llanarth Church. Bolt in West side of tower ; 1.51 ft. above surface. Page 535 of the abstract: Link
Context: SN4257 : Ordnance Survey Benchmark and Bolt - Llanarth, St. David's Church
TIP: Click the map for more Large scale mapping
- Grid Square
- SN4257, 43 images (more nearby 🔍)
- Photographer
- N Scott (more nearby)
- Date Taken
- Monday, 21 March, 2016 (more nearby)
- Submitted
- Monday, 4 April, 2016
- Subject Location
-
OSGB36:
SN 4227 5774 [10m precision]
WGS84: 52:11.7162N 4:18.5482W - Camera Location
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OSGB36:
- View Direction
- EAST (about 90 degrees)