OS MasterMap Topography Layer
Last updated
Last updated
OS MasterMap Topography Layer is the most detailed and accurate view of Great Britain's landscape. It includes features representing the manmade and natural environment, including: land cover, buildings, water, rail, height, heritage, structures, administrative boundaries, and roads, tracks and paths.
This product is updated every six weeks
The OS MasterMap Topography layer is presented seamlessly with more than 500 Million real world objects – all uniquely identified – including roads, buildings, parks and waterways. All data is managed and maintained by Ordnance Survey within one of the world’s largest spatial databases.
OS MasterMap Topography Layer gives you the confidence to make location-based decisions about assets, services, environmental risks, customers and operations.
All features are assigned a unique Topographic Identifier (TOID) to allow assets to be geo-tagged. This makes it ideal for monitoring assets such as pipelines, pylons, bridges and warehouses.
OS MasterMap Topography Layer includes enhanced features such as Building Height Attribute, enabling users to analyse the built environment, and Sites Layer showing the main points of access to key sites.
With OS MasterMap Topography Layer, each feature is a record in a database. Each of these records has information about the feature’s position and shape on Earth – its geometry – as well as details about it termed ‘attributes’. It provides an accurate visual context to help you interpret addresses, routes and imagery provided by the other layers.
Access to this product is free for PSGA members. Find out if you are a PSGA member or download a sample of OS MasterMap Topography Layer data by visiting the Topography layer product page here with links to all of the relevant resources. Alternatively, you can try out the full product by applying for a Data Exploration license here.
This product is available to try out online using one of our three sets of sample data (Exeter, Newport and Inverness) through the OS MasterMap product viewer: