20 years of the OS MasterMap Topography Layer

Celebrating 2 decades since we launched the most detailed and geographically complete dataset of Great Britain
Ordnance Survey
By Ordnance Survey

Our highly accurate geospatial data and printed maps help individuals, governments and companies to understand the world, both in Britain and overseas.

Products and solutions featured in this blog

  • OS MasterMap Topography Layer

    OS MasterMap Topography layer provides a map dataset of Great Britain's landscape – from roads to fields, to buildings and trees, fences, paths and more.

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