The Ordnance Survey OpenData Initiative.

<title/> On 1 April 2010, Ordnance Survey launched OS OpenData and it transformed the way people could access mapping and geographic information (GI) of Great Britain. The online mapping portal allows users to view, download or develop the data with the simple click of a button. In the year since its launch, the data have helped underpin a range of applications, helped promote government transparency and encouraged greater take-up of geographic information. [ABSTRACT FROM AUTHOR]