Chains for surveying? These were the original method of measuring distances since OS was founded. Chain survey was still used in the 1950s and possibly later. Long outdated by electronic distance measuring and later GPS technology.
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See full size image Caption: Surveying chains in Services Block Description: Chains for surveying? These were the original method of measuring distances since OS was founded. Chain survey was still used in the 1950s and possibly later. Long outdated by electronic distance measuring and later GPS technology. Alt text: Surveying chains in Services Block Image credit: Ian Corps Photo subject date: |