Jump to the following:

We use cookies to improve this website. Read about cookies

OS MasterMap Topography Layer

  • Topography Layer TOIDs
  • Change over time shown by the Topography Layer
  • Topography Layer with different styles applied
  • OS MasterMap Topography Layer map of the Tower of London
  • Sites: now part of OS MasterMap Topography Layer

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.

OS MasterMap Topography Layer

Download trial data


Or contact us if you have a question that's not answered here…

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.

Topography Layer upgrade

Over the coming months, we are upgrading the content of Topography Layer. This will let you see even more detail at a glance. Learn more

Product sheets

Topography Layer | Building height/3D modelling

Feel free to download and share these PDFs with your colleagues.

OS MasterMap Topography Layer map data

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.
OS MasterMap Sites Layer over OS MasterMap Topography Layer

Referencing framework

Easily locate and geo-tag your assets, thanks to the topographic identifier (TOID) at the heart of all OS MasterMap layers.

Referencing framework

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.

Building height attribution

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..

Site access and routes

OS MasterMap Topography Layer

Case studies

OS MasterMap Topography Layer

Licensing choices

You can license OS MasterMap Topography Layer under a range of different contractual terms, tailored to how you wish to use it.

Find the right licence for you.

OS MasterMap Topography Layer


Topography Sites Building height attribute
ThemesAdministrative boundaries, buildings, heritage and antiquities, land, rail, roads, tracks and paths, structures, terrain and height, and water.Air transport, Education, Medical care, Rail Transport, Road Transport, Water transport, Utility or Industrial.n/a
Update frequencySix weekly – continuous and cyclic revision (synchronised with other layers).Bi-annuallyNot yet formalised – we are releasing alpha data as we continue to develop BHA
CoverageGreat Britain (define your own area of interest or take advantage of pre-defined areas of interest).Great Britain (define your own area of interest or order 5 km2 tiles).Please see our interactive coverage map
FormatGML 2.1.2GML 3.2.1CSV
SupplyFTP (for orders under 2 Gb) and DVDFTP (for orders under 2 Gb) and DVDDirect customers and Partners:Please contact your account manager or Business Enquiries
Public sector:Available as a download from the members area
Data structureVector (points, lines, polygons and text).
Scale1:1250 to 1:10 000

OS MasterMap Topography Layer

Related products

Back to top
© Ordnance Survey 2016
Be sure to take a look at our Terms of Use and Privacy Policy