A reference point on high ground used in surveying, typically marked by a small pillar.
- ‘Cross marshy ground to a cairn, and after 300 yards you will reach the trig point on top of Auchineden Hill.’
- ‘Continue up the slope to the trig point marking the summit of Connachair at 1,397 ft.’
- ‘The complete route is along public rights of way, Forestry Commission permissive paths, and by special permission to the trig point.’
- ‘When I eventually reached the trig point on the 2,759 ft / 841m summit of Vrackie I swore I would never climb the hill again.’
- ‘The summit trig point is situated on top of the prominent granite tor.’
- ‘From there continue SE to the trig point on the hill's SE top.’
- ‘A bank and ditch ran north-west towards the main camp on the central knoll near the trig point.’
- ‘The trig point at 971 feet is unmissable, newly painted white, and right by the path.’
- ‘Bear left on the top to join the tarmac of the mast access road and the trig point summit pillar is passed on the left.’
- ‘This isn't the trig point at the summit but rather an old way marker a few hundred yards further on.’
Mid 19th century: abbreviation of trigonometrical point.
We take a look at several popular, though confusing, punctuation marks.