Identification

Title
Welsh National Marine Plan Areas
Abstract

Welsh Government is a marine plan authority and is responsible for preparing marine plans for Wales. The marine plan area in Wales comprises the inshore and offshore marine planning regions. The inshore region extends from the mean high water spring tides (MHWS) to the 12 nautical mile (12 nm) limit of the UK territorial sea, and the offshore region from 12nm UK limit of territorial sea to the limit of the Welsh zone.

The sea has a maximum tidal elevation (and land reach) during spring tides and the level of mean high water spring tides (MHWS) is usually used to describe the limits of the sea area. MHWS are not defined. The current OS based map may be used as a general guide and shows Normal Tidal Limits (NTL) which is the average point to which a body of water is affected by the ebb and flow of tides. MHWS will extend further shoreward than this depending upon the gradation of the land. MHWS may be further upstream than this point depending upon the presence of obstructions, such as weirs, which may impede further tidal flow on average tides but become overtopped on larger tides.

NRW marine licensing can provide advice as to the location of MHWS for marine licence applications.

Licence
Open Government Licence for Public Sector Information (OGL)

Read more about this licence

Copyright:

None

Publication date
Type
Spatial data
Category:
Oceans

Features and characteristics of salt water bodies (excluding inland waters). Examples: tides, tidal waves, coastal information, reefs

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Regions
Global
Approved
Yes
Published
Yes
Featured
No
Group
Geography & Technology

Information

Spatial extent
Projection system
EPSG:4326
Extension x0
-7.05000019073486
Extension x1
-2.65651798248291
Extension y0
50.9413299560547
Extension y1
53.9838600158691

Features

Contact

Email
data@gov.wales
Organisation
Welsh Government
Department
Geography & Technology

References

Link online
/layers/geonode:wnmp_areas
Metadata page
/layers/geonode:wnmp_areas/metadata_detail

GeoJSON
Welsh National Marine Plan Areas.json
Excel
Welsh National Marine Plan Areas.excel
CSV
Welsh National Marine Plan Areas.csv
GML 3.1.1
Welsh National Marine Plan Areas.gml
DXF
Welsh National Marine Plan Areas.dxf
Zipped Shapefile
Welsh National Marine Plan Areas.zip
GML 2.0
Welsh National Marine Plan Areas.gml
OGC Geopackage
Welsh National Marine Plan Areas.gpkg

OWS endpoints

WMS
WFS