Digital Geological Map Data of Great Britain - 250k (DiGMapGB-250) version 4

Published by:
British Geological Survey (BGS)
Last updated:
04 June 2015
Topic:
Environment
Licence:
Other Licence
View licence information

Summary

Data identifying landscape areas (shown as polygons) attributed with geological names. The scale of the data is 1:250 000 scale providing a generalised geology. Onshore coverage is provided for all of England, Wales, Scotland and the Isle of Man. Data are supplied as two themes: bedrock and linear features (faults), there is no superficial, mass movement or artificial theme available onshore at this scale. Bedrock geology describes the main mass of solid rocks forming the earth's crust. Bedrock is present everywhere, whether exposed at surface in outcrops or concealed beneath superficial deposits or water bodies. Geological names are based on the lithostratigraphic or lithodemic hierarchy. This means rock bodies are arranged into units based on rock-type and geological time of formation. Where rock-types do not fit into the lithostratigraphic scheme, for example intrusive, deformed rocks subjected to heat and pressure resulting in new or changed rock types; then their classification is based on their rock-type or lithological composition. This assesses visible features such as texture, structure, mineralogy. Data identifying linear features (shown as polylines) represent geological faults at the ground or bedrock surface (beneath superficial deposits). Geological faults occur where a body of bedrock has been fractured and displaced by large scale processes affecting the earth's crust (tectonic forces). The faults theme defines geological faults (shown as polylines) at the ground or bedrock surface (beneath superficial deposits). The data are available in vector format (containing the geometry of each feature linked to a database record describing their attributes) as ESRI shapefiles and are available under BGS data licence.

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Data links

Link to the data Format File added Data preview
Homepage of BGS DigMapGB HTML 04 June 2015 Not available

Additional information

View additional metadata
Added to data.gov.uk
2018-08-24
Access contraints
otherRestrictions
Harvest GUID
9df8df51-63e7-37a8-e044-0003ba9b0d98
Extent
Latitude: 60.8600° to 49.7700°
Longitude: -8.6500° to 1.7800°
Spatial reference system
urn:ogc:def:crs:EPSG::27700
Dataset reference date
2005 (creation)
Frequency of update
notPlanned
Responsible party
British Geological Survey (pointOfContact, distributor, author, custodian)
ISO 19139 resource type
dataset
Metadata language
eng
Source Metadata
XML
HTML

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Licence information

The dataset is made available to external clients under BGS Digital Data Licence terms and conditions. Revert to the IPR Section (DigitalLE@bgs.ac.uk) if further advice is required with regard to permitted usage.