Last week we gave you two maps with 10 differences, how many did you find?
Here’s the answers, ringed in red on the map.
(Map contains Ordnance Survey data © Crown copyright and database rights 2016)
The map, above, is copyright Ordnance Survey. So, who are the Ordnance Survey? Here’s a very brief history.
The O.S. is the national mapping agency of Great Britain and is one of the world’s largest map producers. Ordnance Survey came about because of the lack of decent maps of Scotland following the Jacobite rebellion in 1745 and the threat of war with Napoleon.
The survey of Great Britain was originally carried out using triangulation methods but, more recently, aerial photography has become the chief source for updating and creating new mapping.
In April 2010, Ordnance Survey made available large amounts of data which, whilst still being O.S. copyright, is free to use. Ordnance Survey copyright lasts for 50 years, meaning that, currently, any O.S. mapping pre 1965 is now out of copyright.
Since 2011 Ordnance Survey’s headquarters have been at Adanac Park, Southampton, England.