June 10, 2020


All about OS MasterMap Topography Layer

Update: 1 July 2020, OS APIs now live and available via our OS Data Hub, sign up here

As Great Britain’s national mapping agency, we are responsible for keeping accurate, up-to-date location data and maps of GB for use by the private, public and third sectors.

We map GB’s topography, also known as “the arrangement of the natural and artificial physical features of an area” (Oxford). Every day a team of surveyors, pilots and analysts explore the country to discover changes to the topography and in doing so, take measurements and record these changes in our database.

After much processing and organising, we make this available as the most detailed, current and comprehensive geographic dataset of GB: OS MasterMap Topography Layer. Read More