Code to reproduce the results can be found in the accompanying repository. The resultant data comprise
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catchments_consolidated.*: geospatial data as a shapefile in the British National Grid projection, including auxiliary files. Each feature has the following attributes:identifier: a unique identifier for the catchment based on its geometry. These identifiers are stable across different versions of the data provided the geometry of the associated catchment remains unchanged.company: the water company that contributed the feature.name: the name of the catchment as provided by the water company.
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comment(optional): an annotation providing additional information about the catchment, e.g. overlaps with other catchments.