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Thesaurus Term/Concept: FUNDAMENTAL BENCH MARK
| Identifier |
160452 |
| Class |
MONUMENT TYPE |
| Status |
Preferred |
| Index? |
Yes |
| Scope Note |
Used by Ordnance Survey to record high accuracy height above Ordnance Datum Newlyn. Marked by a low concrete pillar, and maybe surrounded by railings, they comprise an underground chamber protecting the reference point, built directly onto stable bedrock. |
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