2012

J1779 : Killead Triangulation Pillar

taken 11 years ago, near to Killead, Co Antrim, Northern Ireland

Killead Triangulation Pillar
Killead Triangulation Pillar
Killead trig pillar, located in Tully townland between Nutt's Corner and Belfast International Airport at Aldergrove. The pillar sits at approx. 140m above sea level in farmland accessed from Tullywest Road - a covered reservoir is sited close by and there is an access track from the road. The pillar, in excellent condition but leaning at a slight angle, has been sited upon a small mound (possibly a tumulus or medieval motte - see below) and is enclosed by a fence. This is a view of the field with the pillar located on the left atop the mound. Good views are possible to the north-east towards the hamlet of Killead and beyond to Antrim. See also J1779 : Killead Triangulation Pillar.

The Northern Ireland Sites and Monuments Record at LinkExternal link (Archive LinkExternal link ) gives the following information on the mound:

"Just W of the summit of a substantial hill with extensive views. This is a small earthen mound on which is sited an OS triangulation pillar. There is no visible indication of an encircling ditch. The mound is 3.2m high & the summit is 4.2m across N-S x 5.5m E-W, while the base is 17m N-S x 16m E-W. The site is small & is probably a motte. It is not too badly damaged by the pillar."
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.


Creative Commons Licence [Some Rights Reserved]   © Copyright Rossographer and licensed for reuse under this Creative Commons Licence.
This photo is linked from: Automatic Clusters: · Tullywest Road [3] · Pillar Sits at Approx [2] Other Photos: · Killead Triangulation Pillar Title Clusters: · Killead Triangulation Pillar [2] ·
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J1779, 7 images   (more nearby 🔍)
Photographer
Rossographer   (more nearby)
Date Taken
Saturday, 1 December, 2012   (more nearby)
Submitted
Monday, 3 December, 2012
Subject Location
Irish: geotagged! J 172 797 [100m precision]
WGS84: 54:39.1518N 6:11.0785W
Camera Location
Irish: geotagged! J 172 797
View Direction
North-northwest (about 337 degrees)
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Image classification(about): Geograph
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