National Coastal Erosion Risk Management (NCERM)

Natural Resources Wales

This dataset is a more detailed version of the Coastal Erosion data also available on Lle. The National Coastal Erosion Risk Management (NCERM) map shows the spatial NCERM coastal baseline. This baseline is split to ‘frontages’. These are defined as lengths of coast with consistent characteristics based on the cliff behaviour characteristics and the defence characteristics. It is intended as an up-to-date and reliable benchmark dataset showing erosion extents and rates for three periods from a base date of 2005:

  • Short Term (0 – 20yr i.e. 2005 to 2025);
  • Medium Term (20 – 50yr i.e. 2025 to 2055); and
  • Long Term (50 – 100yr i.e. 2055 to 2105).

For the 5, 50 and 95%-ile confidence levels for the following two scenarios (NB All distances are cumulative over time and given in metres):

  • No Active Intervention Policy Scenario; and
  • With the implementation of Shoreline Management Plan 2 Policies.

Defence type and SMP policies for each of the three periods described above are included.

The data and associated information is intended for guidance purposes - it cannot provide details for individual properties. The NCERM information considers the predominant risk at the coast, although flooding and erosion processes are often linked, and data on erosion of foreshore features are, in general, not included.

The data describes the upper and lower estimates of erosion risk at a particular location, within which the actual location of the coastline is expected to lie.  The data does not estimate the absolute location of the future coastline.  Details of geologically complex areas, known as "complex cliffs" are, in general, not included within the dataset due to the inherent uncertainties associated with predicting the timing and extent of erosion at these locations.

Attribution statement

Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.


See metadata

Appears under
Marine Flooding Spatial data

Description Type Endpoint
Great Orme to English Border WMS (inspire-nrw:NRW_NCERM_GRT_ORME_ENG)
Great Orme to English Border WFS (inspire-nrw:NRW_NCERM_GRT_ORME_ENG)
Severn WMS (inspire-nrw:NRW_NCERM_SEVERN)
Severn WFS (inspire-nrw:NRW_NCERM_SEVERN)
Swansea to Camarthen Bay WMS (inspire-nrw:NRW_NCERM_SWAN_CAMA_BAY)
Swansea to Camarthen Bay WFS (inspire-nrw:NRW_NCERM_SWAN_CAMA_BAY)
West of Wales WMS (inspire-nrw:NRW_NCERM_WEST_WALES)
West of Wales WFS (inspire-nrw:NRW_NCERM_WEST_WALES)

Click download links to open them in the browser, or right click and 'Save as' to download to your machine.
Description Format Download Link
Great Orme to English Border GeoJSON
Great Orme to English Border GML
Great Orme to English Border KML
Great Orme to English Border Shapefile
Severn GeoJSON
Severn GML
Severn KML
Severn Shapefile
Swansea to Camarthen Bay GeoJSON
Swansea to Camarthen Bay GML
Swansea to Camarthen Bay KML
Swansea to Camarthen Bay Shapefile
West of Wales GeoJSON
West of Wales GML
West of Wales KML
West of Wales Shapefile