The British Ordnance Survey (1791 - present) is the national mapping agency of Great Britain and is one of the largest producers of maps in the world. This non-ministerial department of the government of the United Kingdom is responsible for producing maps of Great Britain and many of its overseas possessions. The history of the Ordnance Survey goes back as far as 1747, following the Jacobite rising, when King George II commissioned a comprehensive military survey of Scotland to assist further campaigns. The result, produced by Paul Sandby, John Mason and William Roy, was the Duke of Cumberland's Map, the first military quality map of the British Isles. This grew into the Principal Triangulation of Great Britain (1783-1853) under William Roy, and eventually lead to the creation of the Ordnance Survey in 1791. Today the Ordnance Survey produces a large variety of paper maps and digital mapping products. Its large scale maps, issued to the scale of 1:10000, available in sheet map form until the 1980s, are now only available digitally. All maps produced by the Ordnance Survey are in copyright for 50 years after publication.