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OS Open Rivers support

If you need a high-level view of watercourses in Great Britain, OS Open Rivers is for you – and it's completely free.

Does OS Open Rivers show the gradients down which rivers are flowing?

No, but this information is available in our premium product OS MasterMap Water Networks.

Does OS Open Rivers classify watercourses by type?

Yes, OS Open Rivers shows canals and tidal rivers as well as freshwater rivers.

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