What is a Triangulation Pillar? A Comprehensive Guide to Britain’s Trig Points
What is a triangulation pillar? In plain terms, it is a purpose-built marker used in surveying to establish accurate reference points across the landscape. These pillars, more commonly known as trig pillars or trig points, formed the backbone of Britain’s pre-digital mapping age. They enabled surveyors to connect distant points through triangles, laying down a…
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