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Ordnance Survey (OS) are the UK’s go-to GIS data suppliers. They have the largest and most up-to-date maps of the UK, complete with numerous different data overlays. All the data is OpenSource and free to use, at the modest request of acknowledging OS. They also supply other products that are designed to make all this information easy to read, relay, and use.

  • OS MasterMap : has topography and imagery layers, as well as water and road networks throughout the UK.OS
  • Terrain 5 : All significant features, roads, railways, quarries, lakes, flood defences etc.
  • AddressBase : 28million addresses from Royal Mail.