This file contains the digital vector boundaries for Counties and Unitary Authorities (also known as Upper Tier Local Authorities) in UK, as at 31 December 2017.
The boundaries available are:
Full resolution - extent of the realm (usually this is the Mean Low Water mark but in some cases boundaries extend beyond this to include off shore islands);
Full resolution - clipped to the coastline (Mean High Water mark);
Generalised (20m) - clipped to the coastline (Mean High Water mark);
Super generalised (200m) - clipped to the coastline (Mean High Water mark) and
Ultra generalised (500m) - clipped to the coastline (Mean High Water mark).
The boundaries are in the GCS WGS 1984 coordinate system.
Contains both Ordnance Survey and ONS Intellectual Property Rights.