![]() ![]() ![]() The Kent map was published privately and stopped at the county border, while the Essex maps were published by Ordnance Survey and ignore the county border, setting the trend for future Ordnance Survey maps. In 1801, the first one-inch-to-the-mile (1:63,360 scale) map was published, detailing the county of Kent, with Essex following shortly afterwards. In 1991, Royal Mail marked the bicentenary by issuing a set of postage stamps featuring maps of the Kentish village of Hamstreet. īy 1791, the Board received the newer Ramsden theodolite (an improved successor to the one that Roy had used in 1784), and work began on mapping southern Great Britain using a 5 mi (8 km) baseline on Hounslow Heath that Roy himself had previously measured it crosses the present Heathrow Airport. Roy's birthplace near Carluke in South Lanarkshire is today marked by a memorial in the form of a large OS trig point. Work was begun in earnest in 1790 under Roy's supervision, when the Board of Ordnance (a predecessor of part of the modern Ministry of Defence) began a national military survey starting with the south coast of England. Roy's technical skills and leadership set the high standard for which Ordnance Survey became known. This work was the starting point of the Principal Triangulation of Great Britain (1783–1853), and led to the creation of the Ordnance Survey itself. Roy later had an illustrious career in the Royal Engineers (RE), rising to the rank of General, and he was largely responsible for the British share of the work in determining the relative positions of the French and British royal observatories. The survey was produced at a scale of 1 inch to 1,000 yards (1:36,000) and included "the Duke of Cumberland's Map" (primarily by Watson and Roy), now held in the British Library. Among Watson's assistants were William Roy, Paul Sandby and John Manson. In response, King George II charged Watson with making a military survey of the Highlands under the command of the Duke of Cumberland. In 1747, Lieutenant-Colonel David Watson proposed the compilation of a map of the Highlands to help to subjugate the clans. Prince William, Duke of Cumberland realised that the British Army did not have a good map of the Scottish Highlands to locate Jacobite dissenters such as Simon Fraser, 11th Lord Lovat so that they could be put on trial. The origins of the Ordnance Survey lie in the aftermath of the Jacobite rising of 1745. George's Garrison), compiled from surveys carried out between 18 by Lieutenant Arthur Johnson Savage, Royal Engineers. Some of the Copyright Libraries hold complete or near-complete collections of pre-digital OS mapping.ĭetail from 1901 Ordnance Survey map of the Imperial fortress colony of Bermuda (showing St. Ordnance Survey maps remain in copyright for 50 years after their publication. These are still available in traditional sheet form. Small-scale mapping for leisure use includes the 1:25,000 "Explorer" series, the 1:50,000 "Landranger" series and the 1:250,000 road maps. (The latter superseded the 1:10,560 "six inches to the mile" scale in the 1950s.) These large scale maps are typically used in professional land-use contexts and were available as sheets until the 1980s, when they were digitised. The Survey's large-scale mapping comprises 1:2,500 maps for urban areas and 1:10,000 more generally. Ordnance Survey mapping is usually classified as either " large-scale" (in other words, more detailed) or "small-scale". ![]() It produces digital map data, online route planning and sharing services and mobile apps, plus many other location-based products for business, government and consumers. Paper maps for walkers represent only 5% of the company's annual revenue. It was also a member of the Public Data Group. The Ordnance Survey Board remains accountable to the Secretary of State for Science, Innovation and Technology. Since 1 April 2015, Ordnance Survey has operated as Ordnance Survey Ltd, a government-owned company, 100% in public ownership. There was also a more general and nationwide need in light of the potential threat of invasion during the Napoleonic Wars. The agency's name indicates its original military purpose (see ordnance and surveying), which was to map Scotland in the wake of the Jacobite rising of 1745. Ordnance Survey ( OS) is the national mapping agency for Great Britain. Pollokshaws on Roy's Military Survey of Scotland (1747–1755) ![]()
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