When accuracy really counts, choose OS MasterMap Topography Layer. The most detailed, current and comprehensive map dataset of Great Britain, it enables you to take better decisions and manage your assets more effectively.
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OS MasterMap Topography Layer
Benefits and key features
The foundation of the OS MasterMap family, the Topography Layer gives you the context you need to interpret addresses, routes, imagery and all of the other information offered by the other layers, as well as complementary terrain and gazetteer datasets.
Take the best-informed location-based decisions possible about customers, operations, assets and environmental risks.
Understand in detail the potential impact on your customers, assets and sites of interest of developments by you or third-parties.
Identify and communicate clearly your proposals or findings to customers, partners or the general public.
Undertake effective scenario planning, situational awareness, strategic event management and support of security operations.
Start by using it as a simple map, if you wish, then take advantage of its advanced features as your business requirements develop.
Building height attribution – alpha data now available – enables you to make simple 3D visualisations of the urban environment.
If you're in the public sector, your organisation can use it at no extra charge thanks to our mapping agreements.
Sites – now part of the Topography Layer offering
Members of our collective agreeements and customers who license the Topography Layer directly from us can order it online.
Sites data enables you to:
Locate all of the main points of access to key sites quickly and easily in emergency situations.
Understand their proximity and exposure to risks such as crime and floods.
Plan the routes of buses, refuse lorries and postal deliveries to meet the demand they generate.
Understand in detail the potential impacts of planned works or events on important locations.
Easily locate and geo-tag your assets, thanks to the topographic identifier (TOID) at the heart of all OS MasterMap layers.
Building height attribution
If you're an existing customer, download our Alpha release of building height data. It now covers some 10,000 square km of major towns and cities.
Site access and routes
Save vital time in emergency situations by identifying the streets from which you can gain access to depots, schools and more..
To ensure safety and security during the 2012 London Olympics Games, the Metropolitan Police service needed a single, definitive and easy-to-use way to securely view and share mapping, and associated data. During the Games, this new mapping portal was used by more than 2,000 users within the Metropolitan Police. In addition, more than 46 external agencies also had access to the system.
The Department for Business, Innovation and Skills intends to reduce the number of premises used by BIS from around 200 to between 50 and 70. Geographic information supplied through the Public Sector Mapping Agreement has played an important role in the programme’s success to date.