Integrated Hydrological Units of the United Kingdom View Service

Published by:
Environmental Information Data Centre
Last updated:
16 February 2023
Topic:
Not added
Licence:
Other Licence
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Summary

This is a web map view service for the Integrated Hydrological Units (IHU) of the United Kingdom. The IHU define geographical reference units for hydrological purposes including river flow measurement and hydrometric data collection in the UK. The layers in this service represent the following component polygon layers: Hydrometric Areas with Coastline; Hydrometric Areas without Coastline; Groups; Sections; and Catchments. Each layer represents a different level of spatial detail. The coarsest level, Hydrometric Areas, is provided in two versions to meet differing user needs. Each Hydrometric Area is made up of one or more Groups. Each Group carries a name constructed from names of the major river flowing through the Group, the major river flowing into the Group, the major river into which the Group flows, and in some cases also from local county names. Each Group is made up of smaller units called Sections. A Section is the drainage area of a watercourse between two confluences. Only confluences of named watercourses were considered. Similarly to Groups, each Section carries a name constructed from names of the major river flowing through the Section, the major river flowing into the Section, and the major river into which the Section flows. Catchments represent the full area upstream from an outlet of every Section. Polygons within each layer do not have gaps and, with the exception of Catchments, polygons within one layer do not overlap. There are scale dependencies on this web map service which means that the Sections and Catchments layers are visible only at scales less than 1:250,000. The Hydrometric Areas with Coastline layer covers Great Britain and Northern Ireland, but all other layers currently cover Great Britain only as no dataset with river geometries and names with suitable detail is available for Northern Ireland.

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Link to the data Format File added Data preview
getCapabilities response WMS 16 February 2023 Not available

Additional information

View additional metadata
Added to data.gov.uk
2022-09-27T13:01:48
Access contraints
Not specified
Harvest GUID
cca47088-8cdd-4d7a-86b4-90f0a1766364
Extent
Latitude: 60.861° to 49.864°
Longitude: -8.648° to 1.768°
Spatial reference system
Dataset reference date
2015-03-02 (publication)
Frequency of update
notPlanned
Responsible party
Centre for Ecology & Hydrology (pointOfContact, owner); NERC EDS Environmental Information Data Centre (custodian)
ISO 19139 resource type
service
Metadata language
eng
Source Metadata
XML
HTML

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UK Centre for Ecology & Hydrology enquiry service Freedom of information requests for this dataset

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