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OS MasterMap Topography Layer

OS MasterMap Topography Layer® is the most detailed and accurate view of Great Britain's landscape – from roads to fields, to buildings and trees, fences, paths and more.

OS MasterMap Building Height Attribute

OS MasterMap Topography Layer – Building Height Attribute shows building height properties to help manage assets, plan works and visualise urban density.

OS Open Greenspace

A more active, greener, healthier nation.

OS OnDemand

OS OnDemand is no longer available for new users and will be withdrawn on 22nd November 2021. We have now launched a new suite of APIs, accessible from our data access platform, OS Data Hub.

OS Features API

Direct access to the most detailed geographic data for your analysis. Take full advantage of rich geometries and attributes to generate new insight.


Accurate, up-to-date maps that offer the most convenient way to add detailed OS data to your application.

OS Vector Tile API

Slick, quick vector maps for use as a customisable, contextual base, with a focus on web and mobile apps.