OS MasterMap is the definitive source of highly-detailed geographic data of Great Britain. We offer it in layers – topographic, imagery, networks – so you can buy just what you need.
This is the only detailed, heighted water network of Great Britain showing the flow and precise course of rivers, streams, lakes and canals. It supports flood risk management and is ideal for data sharing.
When you need the visual feel for a location, the aerial photography of OS MasterMap Imagery Layer gives you the real-world view.
OS MasterMap Highways Network provides all the highways data you need, in one place. It’s a new, common and authoritative view of the whole road network in Great Britain, ideal for routing and public sector data-sharing.
The most current and complete network view of Great Britain's roads available today – all 550,000kms of it – OS MasterMap® Integrated Transport Network™ Layer underpins key routing applications.