C8938 : Scudion Craig Triangulation Pillar

taken 5 years ago, 4 km ESE of Portrush, Co Antrim, Northern Ireland

Scudion Craig Triangulation Pillar
Scudion Craig Triangulation Pillar
OSNI trig pillar located off the Ballyhome Road about one mile south-east of Portrush. The pillar is located on the edge of a field adjacent to a covered reservoir - access is straightforward up the track from the road to the reservoir.

The view is north towards the channel. The benchmark on the pillar has been levelled to 132.04 metres above MSL C8938 : Flush Bracket, Scudion Craig Triangulation Pillar. The pillar is also part of the OSNI Passive GPS network and a small brass rivet has been added C8938 : Scudion Craig Passive GPS Station].
OSNI Triangulation Stations

The re-triangulation of Northern Ireland by the Ordnance Survey Northern Ireland began in 1950. This was the first complete survey of Northern Ireland which included observations with the new primary triangulation of the country, its connection with the Republic of Ireland and the cross-channel connection between Ireland and Great Britain. This began by OSNI establishing a series of triangulation stations throughout the country. Almost all of these stations were topped by trig pillars and 80, mainly primary and secondary pillars, had been constructed by October 1949. Measurements between primary stations began in 1950 and measurements for these and the secondary stations were completed by July 1956. The construction and measurements for tertiary stations were completed later (probably no later than the mid 1960s). Only two stations are not topped by pillars - Lighthouse Island, marked by a brass rivet, and Ardglass, which utilised the top of a high stone folly. The older triangulation stations on the Lough Foyle Base Line were also re-surveyed as part of this process. A majority of the stations are still extant today but a few have been removed or destroyed.

OSI and OSNI Passive GPS Stations

Ordnance Survey Ireland and Ordnance Survey of Northern Ireland passive GPS stations. A list of the OSI stations, including co-ordinates and some precise location details is available at LinkExternal link (OSNI seem to have removed their data from their website). Many of the stations are existing trig pillars but others have recently been established.

Creative Commons Licence [Some Rights Reserved]   © Copyright Rossographer and licensed for reuse under this Creative Commons Licence.
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C8938, 9 images   (more nearby search)
Photographer
Date Taken
Wednesday, 1 May, 2019   (more nearby)
Submitted
Wednesday, 1 May, 2019
Geographical Context
Coastal  Historic sites and artefacts  Uplands  Farm, Fishery, Market Gardening 
Place (from Tags)
Triangulation Station 
Primary Subject of Photo
Trig Point 
Subject Location
Irish: geotagged! C 892 388 [100m precision]
WGS84: 55:11.3431N 6:35.9417W
Camera Location
Irish: geotagged! C 892 388
View Direction
North-northeast (about 22 degrees)
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Image Type (about): geograph  (Fourth Visitor for C8938)
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