Digital Geological Map Data of Great Britain - 25k (DiGMapGB-25) Bedrock version 2
Data identifying landscape areas (shown as polygons) attributed with geological names. The scale of the data is 1:25 000 scale providing bedrock geology. Onshore coverage is partial and BGS has no intention to create a national coverage at this scale. Areas covered are essentially special areas of 'classic' geology and include Llandovery (central Wales), Coniston (Lake District) and Cuillan Hills (Isle of Skye). 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. The bedrock geology of Great Britain is very diverse and includes three broad classes based on their mode of origin: igneous, metamorphic and sedimentary. The data includes attribution to identify each rock type (in varying levels of detail) as described in the BGS Rock Classification Scheme (volumes 1-3). The bedrock has formed over long periods of geological time, from the Archean eon some 7500 million years ago, to relatively young Pliocene, 58 million years ago. The age of the rocks is identified in the data through their BGS lexicon name (published for each deposit at the time of the original survey or subsequent digital data creation). For stratified rocks i.e. arranged in sequence, this will usually be of a lithostratigraphic type. Other rock types for example intrusive igneous bodies will be of a lithodemic type. More information on the formal naming of UK rocks is available in the BGS Lexicon of Named Rock Units. The bedrock theme defines landscape areas (shown as polygons). The data are attributed with geological names and rock type descriptions. Geological names are based on the lithostratigraphic or lithodemic hierarchy. The lithostratigraphic scheme arranges rock bodies 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. 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. Another batch of tiles was added to the data in 2012 to bring the total to 167 for this version 2 release.
Simple
- Date (Publication)
- 2012
- Date (Creation)
- 2012
- Citation identifier
- http://data.bgs.ac.uk/id/dataHolding/13606385
- Point of contact
-
Organisation name Individual name Electronic mail address Role British Geological Survey
Enquiries
Distributor British Geological Survey
Enquiries
Point of contact
- Maintenance and update frequency
- Not planned
-
GEMET - INSPIRE themes, version 1.0
-
BGS Thesaurus of Geosciences
-
-
UK Location (INSPIRE)
-
GIS
-
Maps
-
Data
-
Digital maps
-
Geology
-
- dataCentre
- Keywords
-
-
NERC_DDC
-
- Access constraints
- Other restrictions
- Other constraints
- license
- Use constraints
- Other restrictions
- Other constraints
-
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 any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.
- Other constraints
-
The dataset is made available to external clients under BGS Digital Data Licence terms and conditions. Revert to the IPR Section ( iprdigital@bgs.ac.uk) if further advice is required with regard to permitted usage.
- Spatial representation type
- Vector
- Denominator
- 250000
- Language
- English
- Topic category
-
- Geoscientific information
- Geographic identifier
-
GBN
ISO 3166_2 2009 revision
- Geographic identifier
-
GREAT BRITAIN [id=139600]
British Geological Survey Gazetteer: Geographical hierarchy from Geosaurus 1979 creation
- End date
- 2008
- Unique resource identifier
- OSGB 1936 / British National Grid (EPSG::27700)
- Distribution format
-
Name Version ESRI shapefiles
- Distributor contact
-
Organisation name Individual name Electronic mail address Role British Geological Survey
Enquiries
Distributor
- OnLine resource
-
Protocol Linkage Name https://www.bgs.ac.uk/datasets/bgs-geology/ Home page for BGS Geology: onshore digital geological map of Great Britain data
- Hierarchy level
- Dataset
- Other
-
dataset
Conformance result
- Title
-
INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology
- Date (Publication)
- 2011
- Explanation
-
See the referenced specification
- Pass
- No
Conformance result
- Title
-
Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
- Date (Publication)
- 2010-12-08
- Explanation
-
See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF
- Pass
- No
- Statement
-
Each DiGMapGB-25 digital tile is typically based on the latest 1:25 000 scale geological map. These geological maps are compiled on contemporary Ordnance Survey National Grid topographical base maps at 1:25 000 scale. Most are based on more detailed 1:10 000 or 1:10 560 (six-inch to one-mile) scale geological maps, and as a consequence they have not been digitised to create DiGMapGB-25 tiles as the source 1:10 000 or 1:10 560 maps could be used to create DiGMapGB-10 data. There are about 52 tiles of 1:25 000 scale data produced by ‘rapid mapping’ surveys in parts of Central Wales, the Scottish Highlands and the Southern Uplands. These were carried out at 1:25 000 scale rather than the normal 1:10 000 scale in order to expedite completion of the 1:50 000 scale map series. The data has been digitally captured from paper record, originally using Bentley MicroStation and latterly ESRI ArcGIS software. Post capture processing has occurred to combine geometry and attribution from existing BGS data resources. Changes may have been made to the geological interpretation but major revisions to the geological lines have generally been avoided. The geological nomenclature has been reviewed and revised, as far as reasonably possible, to conform to the most up-to-date accepted usage; usually this will also agree with the DiGMapGB-50 dataset. The lithology of bedrock units and superficial deposits recorded for DiGMapGB-25 may differ slightly from those given for the same area in DiGMapGB-50, but they should generally fall within the description used for the DiGMapGB-50 data. 34 The change from Version 1 to Version 2 reflected a major change in the coding of polygons and linear features from attribute level 11 to 18. Another batch of tiles was added to the data in 2012 to bring the total released to 167. The LEX_ROCK codes were replaced by LEX_RCS codes with the lithology based on the hierarchical BGS Rock Classification Scheme. The superseded LEX_ROCK field was retained, to link back to previous versions of DiGMapGB, but demoted in the attribute list.
Metadata
- File identifier
- 085bd761-742f-3315-e054-002128a47908 XML
- Metadata language
- English
- Hierarchy level
- Dataset
- Date stamp
- 2024-10-12
- Metadata standard name
- UK GEMINI
- Metadata standard version
-
2.3
- Metadata author
-
Organisation name Individual name Electronic mail address Role British Geological Survey
Point of contact
- Dataset URI