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This overview introduces OS MasterMap Water Network Layer and gives context for all users – highlighting key features, providing examples of uses, and listing details such as file sizes, etc.
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OS MasterMap Water Network Layer is a three-dimensional digital representation of Great Britain's watercourses. The product includes rivers, streams, lakes, lochs and canals as a series of watercourse network lines. The network lines (links) are attributed to provide a range of information about the section of watercourse they depict. OS MasterMap Water Network Layer will significantly enhance systems used to manage waterways and rivers and the flood risk they pose.
Watercourses that are underground or below structures are included where Ordnance Survey capture processes or accepted sources can infer the connection.
Polygons and lines representing the water area and its banks are not supplied in this product but will continue to be maintained and supplied as part of the OS MasterMap Topography Layer product.
OS MasterMap Water Network Layer is provided with three-dimensional coordinates.
The OS MasterMap Water Network Layer product includes the following key features:
Flow and connectivity.
Three-dimensional geometry.
Catchment information including name.
The names of watercourses, including language alternatives.
Vertical relationships where water courses pass over or under one other.
Average widths.
Additional information provided by national authorities.
OS MasterMap Water Network Layer supports a wide range of customer applications that use geographic information. The product can be used alone or in combination with other Ordnance Survey products, such as OS MasterMap Topography Layer, OS MasterMap Imagery Layer and OS Terrain 5.
The OS MasterMap Water Network Layer product could be used for applications such as:
Understanding flood risk
Flood risk mitigation planning
Flood response planning and execution
Detailed flood modelling for insurance and land and property
Environmental impact analysis
Tracking water flows and any contamination
Asset management and protection
The management of statutory directives relating to watercourses
Ecology studies, for example, species migration
Analytics and visual interpretation, particularly when used in combination with other Ordnance Survey products, for example, OS Terrain 5
This overview includes the following sections:
