Digital Geological Map Data of Great Britain - 50k (DiGMapGB-50) version 7
Data identifying landscape areas (shown as polygons) attributed with geological names. The scale of the data is 1:50 000 scale. Onshore coverage is provided for all of England, Wales, Scotland and the Isle of Man. Data are supplied as five themes: bedrock, superficial deposits, mass movement, artificial ground and linear features. 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. 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. Superficial deposits are younger geological deposits formed during the most recent geological time; the Quaternary. These deposits rest on older rocks or deposits referred to as bedrock. The superficial deposits theme defines landscape areas (shown as polygons) attributed with a geological name and their deposit-type or lithological composition. Mass movement describes areas where deposits have moved down slope under gravity to form landslips. These landslips can affect bedrock, superficial or artificial ground. Mass movement deposits are described in the BGS Rock Classification Scheme Volume 4. However this data also includes foundered strata, where ground has collapsed due to subsidence (this is not described in the Rock Classification Scheme). Caution should be exercised with this data; historically BGS has not always recorded mass movement events and due to the dynamic nature of occurrence significant changes may have occurred since the data was released. Artificial (man-made) theme (shown as polygons) indicates areas where the ground surface has been significantly modified by human activity. Whilst artificial ground may not be considered as part of the 'real geology' of bedrock and superficial deposits it does affect them. Artificial ground impacts on the near surface ground conditions which are important to human activities and economic development. Due to the constantly changing nature of land use and re-use/redevelopment, caution must be exercised when using this data as it represents a snapshot in time rather than an evolving picture hence the data may become dated very rapidly. Linear features (shown as polylines) represent geological structural features e.g. faults, folds or landforms e.g. buried channels, glacial drainage channels at the ground or bedrock surface (beneath superficial deposits). Linear features are associated most closely with the bedrock theme either as an intrinsic part of it for example marine bands or affecting it in the case of faults. Landform elements are associated with both bedrock and superficial deposits. All five data themes 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.
dataset
http://www.bgs.ac.uk/products/digitalmaps/digmapgb_50.html
name: DiGMapGB-50
description: More information on the DiGMapGB-50 dataset is available via this URL.
function: information
https://map.bgs.ac.uk/arcgis/services/BGS_Detailed_Geology/MapServer/WMSServer?
name: British geology onshore digital maps 1:50 000 scale | DiGMapGB-50 WMS
description: The WMS layer can be accessed by entering this URL address below into your WMS client. The service supports the British National Grid and Lat/Long WGS84 coordinate systems and the data is visible when zoomed in between 1:100 000 and 1:25 000 scale.
function: download
http://www.bgs.ac.uk/data/services/digmap50wms.html
name: British geology onshore digital maps 1:50 000 scale | DiGMapGB-50 WMS
description: Information about the DiGMapGB-50 WMS layer can be viewed via the web page this URL links to.
function: information
http://data.bgs.ac.uk/id/dataHolding/13480428
eng
OGP
urn:ogc:def:crs:EPSG::27700
geoscientificInformation
publication
2008-06-01
Digital maps
Geology
Data
Maps
GIS
revision
2011
NERC_DDC
-8.6500
1.7800
60.8600
49.7700
revision
2009
GBN
creation
1979
GREAT BRITAIN [id=139600]
2013
creation
2013
asNeeded
The data shows polygonal and selected linear geological information, primarily sourced from published BGS 1:50 000 or 1:63 360 scale maps. For further lineage information see Digital Geological Map of Great Britain, information notes, 2013, http://www.bgs.ac.uk/downloads/start.cfm?id=644
publication
2011
false
See the referenced specification
publication
2010-12-08
false
See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF
ESRI shapefiles
Not entered
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.
otherRestrictions
British Geological Survey
Environmental Science Centre,Keyworth
NOTTINGHAM
NG12 5GG
United Kingdom
+44 115 936 3100 Ex:3585
pointOfContact
British Geological Survey
Environmental Science Centre,Keyworth
NOTTINGHAM
NG12 5GG
United Kingdom
+44 115 936 3143
+44 115 936 3276
distributor
British Geological Survey
Environmental Science Centre,Keyworth
NOTTINGHAM
NG12 5GG
United Kingdom
+44 115 936 3100 Ex:3600
pointOfContact
British Geological Survey
Environmental Science Centre,Keyworth
NOTTINGHAM
NG12 5GG
United Kingdom
+44 115 936 3100 Ex:3146
author
British Geological Survey
Environmental Science Centre,Keyworth
NOTTINGHAM
NG12 5GG
United Kingdom
+44 115 936 3100 Ex:4193
custodian
NERC-BGS Team Leader Basline Products
British Geological Survey
Environmental Science Centre,Keyworth
NOTTINGHAM
NG12 5GG
United Kingdom
+44 115 936 3100 Ex:3146
pointOfContact
2018-08-24