National Superficial Deposits Thickness Model (SDTM)
A series of tiled models of superficial thickness covering the UK. The models are derived by direct modelling (natural neighbour interpolation) of BGS borehole records and BGS DiGMapGB-50. For the purposes of modelling, superficial deposits include sediments deposited during the Quaternary, subsequent Holocene rivers and coastal systems and also modern anthropogenic material, i.e. deposits that are less than 2.6 million years old. The 50 m x 50 m grids are overprinted with a minimum value so that areas where no bore data is present, but drift is known to occur, are given a minimum 1.5 m thickness. The superficial thickness models have been created as baseline datasets for the BGS Geohazard programme. They represent the first attempt by BGS to create nationwide models of such data and the models provide only a simple, mathematical interpretation of reality. The complexity of superficial deposits in Great Britain is such that it is only possible to model indicative values of thickness and elevation. The models should never be used as a substitute for thorough site investigation. The SDTM comprises three individual datasets; two datasets describe thickness variation and a third dataset details 'proximity' of the modelled data to the original source information. 1. The ASTM (Advanced Superficial Thickness Model) is a model of thickness variation indirectly derived from archive borehole records and map data. 2. The BSTM (Basic Superficial Thickness Model) is a model of thickness variation directly derived from archive borehole records. 3. The DBUFF (distance buffer) dataset is a calculation of spatial distance to the location of any data point used in the model. This provides the user with an indication as to how far the computer has had to interpolate and extrapolate the data from a measured observation point. For more information, refer to the user guide: The National Superficial Deposit Thickness Model (version 5). BGS Open Report OR/09/49.
https://webapps.bgs.ac.uk/data/publications/publication.html?id=19867430
Simple
- Date (Creation)
- 2001
- Date (Revision)
- 2008-08
Distributor
British Geological Survey
-
Enquiries
0115 936 3276
The Lyell Centre, Research Avenue South
,
EDINBURGH
,
LOTHIAN
,
EH14 4AP
,
United Kingdom
0115 936 3142
0115 936 3276
Point of contact
British Geological Survey
-
Enquiries
0115 936 3276
The Lyell Centre, Research Avenue South
,
EDINBURGH
,
LOTHIAN
,
EH14 4AP
,
United Kingdom
0115 936 3142
0115 936 3276
Distributor
British Geological Survey
-
Enquiries
0115 936 3276
Environmental Science Centre, Nicker Hill, Keyworth
,
NOTTINGHAM
,
NOTTINGHAMSHIRE
,
NG12 5GG
,
United Kingdom
0115 936 3143
0115 936 3276
Originator
British Geological Survey
-
Enquiries
0115 936 3276
Environmental Science Centre, Nicker Hill, Keyworth
,
NOTTINGHAM
,
NOTTINGHAMSHIRE
,
NG12 5GG
,
United Kingdom
0115 936 3143
0115 936 3276
Point of contact
British Geological Survey
-
Enquiries
0115 936 3276
Environmental Science Centre, Nicker Hill, Keyworth
,
NOTTINGHAM
,
NOTTINGHAMSHIRE
,
NG12 5GG
,
United Kingdom
0115 936 3143
0115 936 3276
- Maintenance and update frequency
- asNeeded As needed
- GEMET - INSPIRE themes, version 1.0
- BGS Thesaurus of Geosciences
-
- UK Location (INSPIRE)
- Geological data
- Geological models
- Quaternary
- Surficial geology
- dataCentre
- Keywords
-
- NERC_DDC
- Access constraints
- otherRestrictions Other restrictions
- Other constraints
- restricted
- Use constraints
- otherRestrictions 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
- Either: (i) the dataset is made freely available, e.g. via the Internet, for a restricted category of use (e.g. educational use only); or (ii) the dataset has not been formally approved by BGS for access and use by external clients under licence, but its use may be permitted under alternative formal arrangements; or (iii) the dataset contains 3rd party data or information obtained by BGS under terms and conditions that must be consulted in order to determine the permitted usage of the dataset. Refer to the BGS staff member responsible for the creation of the dataset if further advice is required. He / she should be familiar with the composition of the dataset, particularly with regard to 3rd party IPR contained in it, and any resultant use restrictions. This staff member should revert to the IPR Section (ipr@bgs.ac.uk ) for advice, should the position not be clear.
- Spatial representation type
- grid Grid
- Distance
- 50 urn:ogc:def:uom:EPSG::9001
- Metadata language
- EnglishEnglish
- Topic category
-
- Geoscientific information
- Geographic identifier
-
GB
- Date (Revision)
- 2009
- Geographic identifier
-
UK [id=139300]
- Date (Creation)
- 1979
- Geographic identifier
-
UKM
- Date (Revision)
- 2009
N
S
E
W
- Begin date
- 2002-09
- End date
- 2017-10
- Supplemental Information
- All grids have been compiled to the same written standard using the same software, see report "Generation of Superficial Deposits Thickness Models and Rockhead contours for Great Britain", BGS Internal Report IR/04/082R. Cell size or grid spacing is of 50 meters.
- Unique resource identifier
- OSGB 1936 / British National Grid (EPSG::27700)
- Unique resource identifier
- WGS 84 (EPSG::4326)
- Distribution format
-
-
ESRI ArcInfo ASCII Grid
()
-
Raster GIS data
()
-
MapInfo (TAB)
()
-
ESRI ArcInfo ASCII Grid
()
Distributor
British Geological Survey
-
Enquiries
0115 936 3276
The Lyell Centre, Research Avenue South
,
EDINBURGH
,
LOTHIAN
,
EH14 4AP
,
United Kingdom
0115 936 3142
0115 936 3276
Distributor
British Geological Survey
-
Enquiries
0115 936 3276
Environmental Science Centre, Nicker Hill, Keyworth
,
NOTTINGHAM
,
NOTTINGHAMSHIRE
,
NG12 5GG
,
United Kingdom
0115 936 3143
0115 936 3276
- OnLine resource
- Superficial thickness model ( WWW:LINK-1.0-http--link )
- Hierarchy level
- dataset Dataset
- Other
- dataset
Conformance result
- Date (Publication)
- 2011
- Explanation
- See the referenced specification
- Pass
- No
Conformance result
- 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
- The data are derived from three primary sources: boreholes, geological map data and a digital terrain model (topography). Borehole data were derived entirely from the BGS Single Onshore Borehole Index (SOBI). All boreholes in SOBI at the time of data creation were assessed, and where possible, some indication of superficial deposit thickness was digitally captured. Geological map data were derived from DiGMapGB-50 version 5. Digital terrain data were derived from the Intermap® NextMap© DTM product. BGS SOBI/BoGE and BGS Digmap v.1.04 and v. 1.05 for the original data set (version 1). The versions of Digmap will change with the versions of the GeoHazarDs superficial thickness models.
- File identifier
- 9df8df51-63de-37a8-e044-0003ba9b0d98 XML
- Metadata language
- EnglishEnglish
- Hierarchy level
- dataset Dataset
- Date stamp
- 2025-12-11
- Metadata standard name
- UK GEMINI
- Metadata standard version
- 2.3
Point of contact
British Geological Survey
Environmental Science Centre, Keyworth
,
NOTTINGHAM
,
NOTTINGHAMSHIRE
,
NG12 5GG
,
United Kingdom
+44 115 936 3100
- Dataset URI
- http://data.bgs.ac.uk/id/dataHolding/13480413
Overviews
Spatial extent
N
S
E
W
Provided by
Associated resources
Not available
NERC Data Catalogue Service