Latest BGS Geology 50K mapping data launched
Some of our most widely used maps have received a major update, including the 1:50 000-scale map series that now includes enhanced coverage of Great Britain.
06/11/2025 By BGS Press
BGS Geology, BGS’s digital geological maps covering Great Britain, is based on a suite of published paper maps enhanced with latest digital mapping. It is periodically updated with information from field surveys as well as including previously unpublished maps or additional interpretation.
The latest version of BGS Geology 50K now covers the majority of Great Britain plus the Isle of Man, an estimated 236 000 km2. This includes coverage for approximately 99 per cent of the bedrock and approximately 95 per cent of the superficial deposits across the country.
These geological maps provide crucial information like rock types and faults, forming a valuable resource for a wide range of uses, such as infrastructure planning and development, including ground source heat pumps, and environmental assessment.
The latest version of BGS Geology 50K now covers the majority of Great Britain and the Isle of Man, an estimated 236 000 km2. BGS © UKRI.
The 50K-scale map offers a balance between detail and coverage, making it highly useful for a wide range of applications, from regional assessment to local-scale intelligence.
The latest update incorporates all edits to the dataset since the previous version’s release in 2017. This includes new and revised tiles of geology data, updates to the coastline and various corrections to geological features across the country. Also included is additional attribution on linear features depicting fault trace handedness and hanging-wall orientation on fault features.
Henry Holbrook, data sharing lead at BGS.
In addition to the 50K maps, BGS has also updated its 10K and 25K maps. BGS Geology 10K and 25K is the most detailed geological dataset we have produced Around half of the country is now covered with this update, including many urban centres and transport routes in Great Britain.
This latest release of BGS Geology 10K and 25K includes new maps and is based on our highest-resolution survey mapping. It will continue to be of great help to the public sector, the construction industry and academics.
Henry Holbrook
BGS Geology 10K and 25K in the south Nottinghamshire region. BGS © UKRI.
BGS’s data for both BGS Geology 50K and BGS Geology 10K and 25K is available under licence. You can also view the BGS Geology 50K map data in the GeoIndex viewer. Further information about BGS Geology 50K and BGS Geology 10K maps is available on the BGS website.
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