IMG_3894

Surveying chains in Services Block
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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 Long outdated by electronic distance measuring and later GPS technology.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
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IMG_3894

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 Long outdated by electronic distance measuring and later GPS technology.

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