10 interesting facts about Trig Points in the UK
Posted by Spotty Otter on 14th Jul 2025
What Are Trig Points?
In the United Kingdom, trig points are those curious concrete pillars you’ll often see perched on hilltops or scattered across open landscapes. Originally erected by Ordnance Survey from 1935 onwards, their job was to help accurately retriangulate Great Britain, forming the backbone of modern map-making.
These iconic structures quickly became part of the countryside we
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