Category:Ordnance Survey 1st series 1:10560

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In October 1840 the Ordnance Survey decided to adopt the six-inch mapping scale (1:10,560) previously used in Ireland, and in September 1841 work began to survey Lancashire. In July 1854 rural 1:2,500 scale maps were commissioned and in 1880 this was accelerated to cover all areas of the country. England, Wales and Scotland were surveyed in the following years, and each county was subsequently revised three to five times. These sheets have become known as County Series, named as such because individual counties were surveyed separately from their neighbours, often on different origins.

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