Ordnance Survey have released OS MasterMap Water Network, a new OS MasterMap layer. It provides the flow, centre line geometry and height of all rivers, streams, lakes, lochs and canals across Great Britain. The layer is a structured link/node representation of all connected watercourses including the underground network (inferred based on entry and exit points). This article takes you through loading (Productivity Suite is not required), merging, de-duplicating and creating a geometric water network.
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