J2873 : Black Mountain South Triangulation Pillar

taken 2 years ago, 3 km from Springfield, Northern Ireland

Black Mountain South Triangulation Pillar
Black Mountain South Triangulation Pillar
Trig pillar on Black Mountain South (also known as Black Hill) above Belfast. The pillar is in good condition and offers 360 views in all directions - in overcast conditions I could still see east to the Isle of Man, south to the Mournes and west across Lough Neagh to the Sperrins. This is the view south-east across south Belfast towards Slieve Croob J3145 : Slieve Croob Triangulation Pillar.
See also J2873 : Flush Bracket, Black Mountain South Triangulation Pillar and J2873 : Spider, Black Mountain South Triangulation 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.

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J2873, 8 images   (more nearby search)
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Date Taken
Sunday, 4 February, 2018   (more nearby)
Monday, 5 February, 2018
Geographical Context
Historic sites and artefacts  Uplands 
Place (from Tags)
Primary Subject of Photo
Trig Point 
Subject Location
Irish: geotagged! J 284 730 [100m precision]
WGS84: 54:35.3363N 6:0.8519W
Camera Location
Irish: geotagged! J 284 730
View Direction
East-southeast (about 112 degrees)
Clickable map

Image Type (about): geograph 
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