Identification info

Metadata Language

English (en)

Dataset Reference Date ()

2016-11

Identifier

http://data.bgs.ac.uk/id/dataHolding/13607054

Maintenance and update frequency

asNeeded

GEMET - INSPIRE themes

• Geology

BGS Thesaurus of Geosciences

• Natural hazards

• Insurance

• Risk management

• Risk analysis

Keywords

• NERC_DDC

Limitations on Public Access

otherRestrictions

Other constraints

restricted

Other constraints

The dataset has been formally approved by BGS for access by external clients under a BGS Digital Data Licence, issued via BGS's IPR Section. The dataset must not be provided to, or be accessible by, an external client until the IPR Section confirms that signed licence documentation is in place. Refer to the IPR Section (DigitalLE@bgs.ac.) if further advice is required.

Use constraints

otherRestrictions

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. iprdigital@bgs.ac 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

50000

Topic category

• Geoscientific information

Extent

GBN

Dataset Reference Date ()

2009

Extent

GREAT BRITAIN [id=139600]

Dataset Reference Date ()

1979

Begin date

1885

End date

2016-11-18

Additional information

Positional Accuracy - Cartographic Accuracy plus or minus 50 metres. Accuracy of geological interpretation not assessed.

 

Distribution Information

Data format

 

Quality Scope

dataset

Other

dataset

Statement

This dataset is the Derived Postcode Database (DPD) issued as part of the GeoSure Insurance V7 product, incorporating postcode data from OS Open CodePoint Data 2016.1. The GeoSure DPD is a stand-alone database, which can be provided separately to the full GeoSure Insurance Product V7. The GeoSure Insurance Product (including the Derived Postcode Database) represents the end of an interpretation process, starting with the BGS Digital Geological Map of Great Britain at the 1:50,000 scale (DiGMapGB-50). This digital map is the definitive record of the types of rocks underlying Great Britain (excluding Northern Ireland and the Isle of Man), as represented by various layers, starting with Bedrock and moving up to overlying Superficial layers. In 2003, the BGS also published a series of GIS digital maps identifying areas of potential natural ground movement hazard in the Great Britain, called GeoSure. There are six separate hazards considered: shrink-swell clays, slope instability, dissolution of soluble ground, running sand, compressible and collapsible deposits. These maps were derived by combining the rock-type information from DiGMapGB-50 with a series of other influencing factors which may cause the geological hazards (e.g. steep slopes, groundwater). In 2005, the BGS used the GeoSure maps to make an interpretation of subsidence insurance risk for the British property insurance industry, released as the GeoSure Insurance Product. This represents the combined effects of the 6 GeoSure hazards on buildings in a postcode database. The combined hazard is represented numerically in the Derived Postcode Database as the Total Hazard Score, with a breakdown into the component hazards. The methodology behind the DPD involves balancing the 6 GeoSure natural ground stability hazards against each other. The GeoSure maps themselves have a fivefold coding (A to E), and the balancing exercise involves comparing each level across the six hazards e.g. comparing a level C shrink-swell clay area with a level C running sand area. The comparison is done by a process involving expert analysis and statistical interpretations to estimate the potential damage to a property (specifically low-rise buildings only). Each level of each of the hazards is given a 'hazard score' which can then be added together to derive a Total Hazard Score at a particular location (e.g. within a given postcode). The detail of the methodology is described in more detail in the GIP User Guide (OR/15/021) "User Guide for the GeoSure Insurance Product (version 7)", available from the British Geological Survey: http://nora.nerc.ac.uk/510820/

Metadata

File identifier

42aab676-3456-2148-e054-002128a47908 XML

Metadata Language

English (en)

Resource type

dataset

Metadata Date

2022-05-23

Metadata standard name

UK GEMINI

Metadata standard version

2.3