OS MasterMap Water Network

OS MasterMap Water Network

What is it?

 This is a representation of waterways across Great Britain. It contains water flow directions and watercourse names.


Where does it come from?

Ordnance Survey


How often is it updated?

Typically every 12 months.


What area does it cover?

Great Britain


How might you use it?

This dataset might be used for:

  • Visualising flow direction and catchments
  • Finding out water course names
  • Getting accurate watercourse lengths


Data Licence

Public Sector Geospatial Agreement (PSGA)

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05 April 2022


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