Ordinance Survey Office
The Ordnance Survey was, and still is, the official National Mapping Agency in Great Britain. Founded in 1791 as the cartographic arm of the British Army, The Ordnance Survey was primarily responsible for mapping Great Britain itself. Yet as the British Empire expanded its holdings militarily, Ordnance Surveys were instigated at key locations throughout the world, often in collaboration with other governmental or semi-governmental bodies.
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