In 1936, the Ordnance Survey began to construct concrete triangulation pillars, or trig points, to aid accurate measurement and map-making using the principles of trigonometry. By 1962, more than ...
On a glorious sunny June day we reached the summit of Céidín, south of the Glen of Imall, to find a triangulation station or trig pillar. These concrete pillars are found on many prominent peaks ...
There are few sights more stirring to a map enthusiast than the tapered outline of a triangulation pillar emerging from the mist of a bleak mountain. There are, or were, 6,173 of these mute beacons - ...
On 18 April 1936, a group of surveyors gathered around a white concrete pillar in a field in Cold Ashby, Northamptonshire, and began the retriangulation of Great Britain. Ordnance Survey (OS) is ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback