Monday, 18 April 2016

Day 109 - 80 years of triangulation

Today is the 80th birthday of the humble trig (or triangulation) pillar, used by OS map surveyers to map Britain since April 1936.
I couldnt find one locally, there was one on Canford Heath but apparantly it has been destroyed so I found a picture of the highest one I have ever been to (and presumably the highest in the UK), on the summit of Ben Nevis

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