Digital Geological Map Data of Great Britain - 25k (DiGMapGB-25) Superficial version 2
Data identifying landscape areas (shown as polygons) attributed with geological names and rock type descriptions. The scale of the data is 1:25 000 scale. 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). Superficial deposits are the youngest geological deposits formed during the most recent period of geological time, the Quaternary, which extends back about 2.58 million years from the present. They lie on top of older deposits or rocks referred to as bedrock. Superficial deposits were laid down by various natural processes such as action by ice, water, wind and weathering. As such, the deposits are denoted by their BGS lexicon name, which classifies them on the basis of mode of origin (lithogenesis) with names such as, 'glacial deposits', 'river terrace deposits' or 'blown sand'; or on the basis of their composition such as 'peat'. Most of these superficial deposits are unconsolidated sediments such as gravel, sand, silt and clay. The digital data includes attribution to identify each deposit type (in varying levels of detail) as described in the BGS Rock Classification Scheme (volume 4). 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.
dataset
:
http://data.bgs.ac.uk/id/dataHolding/13606386
English
Geoscientific information
GEMET - INSPIRE themes, version 1.0:
BGS Thesaurus of Geosciences:
Digital maps
Geology
GIS
Maps
UK Location (INSPIRE)
Data
Free:
Free:
NERC_DDC
-8.6500,
49.7700,
1.7800,
60.8600
GBN, GREAT BRITAIN [id=139600]
creation: 2008
unknown
-
2008
vector
British Geological Survey
Enquiries
Environmental Science Centre, Nicker Hill, Keyworth,
NOTTINGHAM,
NG12 5GG,
United Kingdom
tel: 0115 936 3143
email:
enquiries@bgs.ac.uk
Role: distributor
British Geological Survey
Enquiries
Environmental Science Centre, Nicker Hill, Keyworth,
NOTTINGHAM,
NG12 5GG,
United Kingdom
tel: 0115 936 3143
email:
enquiries@bgs.ac.uk
Role: originator
British Geological Survey
Enquiries
Environmental Science Centre, Nicker Hill, Keyworth,
NOTTINGHAM,
NG12 5GG,
United Kingdom
tel: 0115 936 3143
email:
enquiries@bgs.ac.uk
Role: point of contact
Data Quality
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.
Equivalent Scale:
1:
250000
INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology
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
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.
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.
Metadata about metadata
085bd761-7430-3315-e054-002128a47908
British Geological Survey
Environmental Science Centre,Keyworth,
NOTTINGHAM,
NG12 5GG,
United Kingdom
tel: +44 115 936 3100
email:
enquiries@bgs.ac.uk
Role: point of contact
2024-04-24