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OS MasterMap Networks - Water Layer

OS MasterMap® Water Network Layer offers one of the world’s most detailed, heighted water networks, showing the flow and precise course of every river, stream, lake and canal in Great Britain.

Detailed watercourse mapping

OS MasterMap Networks - Water Layer provides a detailed centre line following the curve of the waterway precisely. It includes the coordinates of watercourse sources and where they meet, exactly.

Content and context

With this water network data, you can look up the height of any water course, along with its flow direction, gradient, length and width anywhere along its length.

How far, how wide

As an island, water defines Great Britain. No other visualisation of our nation’s watercourses details the heights of watercourses in relation to sea level with this level of precision.

Complete picture

For planners, for surveyors, for engineers – this Layer offers the potential to model in 2D and 3D like never before, thanks to the clarity of river flow, gradient and river widths.

Answers on tap

Answers on tap

From aqueducts to tunnels, with annotations of flow direction, OS MasterMap Water Network Layer provides the detailed mapping that’s most useful – including underground watercourses (inferred from entry and exits).

Content and context

Content and context

OS MasterMap Networks - Water Layer provides a detailed centre line following the curve of the waterway precisely. It includes the coordinates of watercourse sources and where they meet, exactly.

Specifications

Technical specification
Key FeaturesWhat this product offers
FormatGML 3.2
Data structureVector - topologically structured link and node network
AttributesWatercourse name, flow direction, gradient, primary flow, TOID® reference, EA or SEPA catchment name and ID
Scale1:1250 – 1:10 000
Update frequencyQuarterly - April, July, October, January
SupplyDownload – You’ll need geographic information (GIS) software to use the data.
CoverageNational

How to get this product

Sample data

Give it a try

Download a small area of OS MasterMap Water Network Layer sample data.

Or you can apply for a Data Exploration Licence to try out the real thing.

OS MasterMap Water Network Layer FAQs