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BGS offshore small-scale digital mapping Web service

This Web service provides layers containing offshore digital mapping datasets compiled by the British Geological Survey which have coverage across the UK Continental Shelf (UKCS), mostly at scales smaller than 1:250 000. It provides view and download services for the following datasets: - BGS Offshore Bedrock 250k - BGS Seabed Sediments 250k (including the Marine Hard Substrate Dataset) - BGS Offshore Quaternary 250k - 1:1 000 000 scale geological factor map: bedrock summary lithology - 1:1 000

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Source details

Licence: ["The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in an

Evidence quality: 35.9

Listed in data.gov.uk public catalogue API on 2026-10-16; relevance/value screened (haiku).

Metadata checked: 2026-10-14T13:20:00.000Z

What's in it

Data offered docs-verified
BGS Offshore Bedrock 250k · BGS Seabed Sediments 250k (including the Marine Hard Substrate Dataset) · BGS Offshore Quaternary 250k · 1:1 000 000 scale geological factor map: bedrock summary lithology · 1:1 000 000 scale geological factor map: Quaternary deposit summary lithology · 1:1 000 000 scale geological factor map: Quaternary deposit thickness · BGS Predictive Seabed Sediments (UK)
Coverage docs-verified
UK Continental Shelf (UKCS)
Resolution docs-verified
Scale-based, not pixel resolution: mostly smaller than 1:250 000
Update frequency docs-verified
asNeeded (no fixed schedule)
Access docs-verified
No authentication listed. Licence: copyright vested in NERC; reproduction or transmission requires prior permission of the copyright holder via the BGS Intellectual Property Rights Manager.

Useful for

Use cases llm-inferred
Regional bedrock and superficial geology context for an offshore cable or pipeline route desk study · Seabed sediment and hard substrate baseline for offshore environmental screening · Quaternary deposit thickness and lithology review for offshore geotechnical desk study
Audience llm-inferred
geotechnical engineers · marine and environmental consultants · GIS analysts · marine ecologists

Limitations

Constraints llm-inferred
Small-scale mapping (mostly smaller than 1:250 000), so not suitable for site-specific detail · Offshore UKCS coverage only; not onshore · NERC/BGS give no warranty as to the quality or accuracy of the information supplied · Reproduction of derived materials requires prior permission from the copyright holder

Evidence

Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.