2006
ND2763 : Hillhead Farm triangulation pillar
taken 18 years ago, near to Lyth, Highland, Scotland
Hillhead Farm triangulation pillar
This pillar was built as part of the Ordnance Survey's measurement of the 'Caithness Base' in 1952 - a dead straight line 15½ miles long, created in order to relate measurements extrapolated from base lines in England during the Retriangulation of Great Britain (the exercise in which the now familiar National Grid was created). The pillar was placed half way along the line, in case the ground proved too boggy to measure all the way from Spital Hill
ND1655 to Warth Hill
ND3769, but fortunately it was a dry summer and the exercise was completed successfully.
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Geograph (Second Visitor for ND2763)
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