Ordnance Survey trig pillar
E513602
An Ordnance Survey trig pillar is a concrete triangulation point used in the United Kingdom’s national mapping system to provide precise reference locations for surveying and map-making.
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
concrete pillar
ⓘ
geodetic triangulation station ⓘ survey marker ⓘ |
| constructedFor | Retriangulation of Great Britain NERFINISHED ⓘ |
| coordinateSystem | British National Grid NERFINISHED ⓘ |
| country | United Kingdom ⓘ |
| documentedIn |
Ordnance Survey databases
NERFINISHED
ⓘ
trigpointing websites ⓘ |
| foundIn |
England
NERFINISHED
ⓘ
Isle of Man NERFINISHED ⓘ Northern Ireland NERFINISHED ⓘ Scotland NERFINISHED ⓘ Wales NERFINISHED ⓘ |
| hasAlternativeName |
triangulation pillar
ⓘ
trig pillar ⓘ trig point ⓘ |
| hasComponent |
brass flush bracket
ⓘ
central mark ⓘ mounting plate for theodolite ⓘ triangulation plate ⓘ |
| hasFunction |
define fixed survey control points
ⓘ
enable accurate angle measurement between stations ⓘ |
| hasIdentifier |
OS trig number
ⓘ
flush bracket number ⓘ |
| hasPurpose |
geodetic control
ⓘ
map-making ⓘ surveying ⓘ triangulation ⓘ |
| hasShape | truncated square pyramid ⓘ |
| hasTopFeature |
metal mounting plate with three threaded holes
ⓘ
reference mark for instrument centring ⓘ |
| heritageStatus | many examples considered historic structures ⓘ |
| introducedIn | 1930s ⓘ |
| locatedOn |
hilltops
ⓘ
mountain summits ⓘ prominent landscape points ⓘ |
| material | concrete ⓘ |
| networkType | first-order triangulation network ⓘ |
| partOf | Ordnance Survey national triangulation network NERFINISHED ⓘ |
| replacedBy | GPS survey control ⓘ |
| status | largely superseded by satellite geodesy ⓘ |
| typicalBaseWidth | about 0.8 metres ⓘ |
| typicalHeight | about 1.2 metres ⓘ |
| usedBy | Ordnance Survey NERFINISHED ⓘ |
| usedWith |
optical plummet
ⓘ
theodolite ⓘ |
| visitedBy |
hillwalkers
ⓘ
trigpoint enthusiasts ⓘ walkers ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.