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Unitisation Boundaries

Publisher
Natural Resources Wales
Updated
16 September 2026
Topic
Not set
Licence
Not set

Summary

Designated sites in Wales include, but is not limited to, Sites of Special Scientific Interest (SSSI), Special Protection Areas (SPA), Special Areas of Conservation (SAC) and Ramsar sites. These sites have been divided into management units. This dataset contains the boundaries of these units and includes information such as designation type, unit name, unit area, national grid reference and former Countryside Council for Wales (CCW) regions.

Digitising began in 2007 and is on going as and when new sites are created or existing sites are altered. The purpose of these management units is to have a coherent plan in order to manage sites in a practical manner to ensure that work is done to get sites and their corresponding features into a favourable condition, as per the requirements of the protected sites.

Data links

Link Format Preview Updated
Download Data and Web Services – 16/9/2026
Web Mapping Service – 16/9/2026

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Additional information

Source Metadata
XML, HTML
Date added
17 August 2026
Harvest GUID
NRW_DS112540
Extent (Latitude)
53.513067° to 51.240829°
Extent (Longitude)
-5.777741° to -2.608865°
Dataset reference date (publication)
2026-07-31
Frequency of update
asNeeded
Access constraints
The following data is considered OS derived data and is therefore jointly owned by NRW and the Ordnance Survey. There are no access restrictions on this data. However there are third party use restrictions.
Responsible party
Natural Resources Wales (NRW) (owner, custodian, distributor); Countryside Council for Wales (CCW) (originator)
ISO 19139 resource type
dataset
Metadata language
eng