From the 1840s, the Ordnance Survey began the work of mapping Britain, county by county, at the scale of six inches to the mile (1:10,560). From 1854, cultivated and inhabited areas were mapped at the scale of 1:2,500 (25.344 inches to the mile), parish by parish, and then continuously. The complete 1:10,560 series is included in the collection (Epoch 1).
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