OSNI Triangulation Stations :: Shared Description

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.
by Rossographer
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127 images use this description. Preview sample shown below:

J5161 : Killinakin Triangulation Pillar by Rossographer
J0220 : Flush Bracket, Slieve Gullion Triangulation Pillar by Rossographer
J6248 : Flush Bracket, Tara Fort Triangulation Pillar by Rossographer
J3971 : Spider, Braniel Hill Triangulation Pillar by Rossographer
J4576 : Cairngaver Triangulation Pillar by Rossographer
J2824 : Spider, Slieve Muck Triangulation Pillar by Rossographer
J4179 : Ballycultra Triangulation Pillar by Rossographer
J3527 : Slieve Donard Triangulation Pillar by Rossographer
J2974 : Black Mountain North Triangulation Pillar by Rossographer
J4665 : Flush Bracket, Drumhirk Triangulation Pillar by Rossographer
J5968 : Reservoir, Ballyboghilbo by Rossographer
D1723 : Trostan Triangulation Pillar by Rossographer
J4177 : Flush Bracket, Standard Hill Triangulation Pillar by Rossographer
J3163 : Flush Bracket, Tullyard Triangulation Pillar by Rossographer
J3163 : Spider, Tullyard Triangulation Pillar by Rossographer
J2912 : Fields near Kilkeel by Rossographer
C8938 : Flush Bracket, Scudion Craig Triangulation Pillar by Rossographer
J3163 : Tullyard Triangulation Pillar by Rossographer
J5536 : Isabella's Tower, Ardglass by Rossographer
J3366 : Spider, Ballycowan Triangulation Pillar by Rossographer
J2875 : Divis Triangulation Pillar by Rossographer
J4576 : Scrabo from Cairngaver by Rossographer
J2482 : Lyles Hill Triangulation Pillar by Rossographer
J3337 : Flush Bracket, Slievenaslat Triangulation Pillar by Rossographer
H1228 : Flush Bracket, Cuilcagh Triangulation Pillar by Rossographer

... and 102 more images.

These Shared Descriptions are common to multiple images. For example, you can create a generic description for an object shown in a photo, and reuse the description on all photos of the object. All descriptions are public and shared between contributors, i.e. you can reuse a description created by others, just as they can use yours.
Created: Fri, 3 Jun 2011, Updated: Thu, 12 Jan 2012

The 'Shared Description' text on this page is Copyright 2011 Rossographer, however it is specifically licensed so that contributors can reuse it on their own images without restriction.

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