Ordnance Survey

Ordnance Survey (OS) is the national mapping agency for Great Britain and is one of the world's largest producers of maps. Since 1 April 2015 it has operated as Ordnance Survey Ltd, a government-owned company, 100% in public ownership. The Ordnance Survey Board remain accountable to the Secretary of State for Business Innovation and Skills. It is also a member of the Public Data Group.