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Ordnance Survey – Great Britain's national mapping agency

Ordnance Survey's OS MasterMap represents the most advanced, intelligent data and analysis tool of its generation. > Find out more
OS MasterMap data is designed for use as an intelligent digital map within geographical information systems (GIS) and Computer Aided Design (CAD) database systems. > Find out more
OS MasterMap is a digital representation of the real world containing more than 450 million uniquely identified geographic features. It is updated daily as a consistent framework for the referencing of geographic information in Great Britain. > Find out more
OS MasterMap is ordered via the data selector on which account customers can create and save estimates, view OS MasterMap contracts and place orders. These orders can be supplied on CD, DVD or downloaded from a file transfer protocol (FTP).
OS MasterMap has a minimum annual contract value of £500.