Editing OR/18/046 What data are used in the GV Models

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* new sections created as part of the GV Model development to complete the boundaries for each regional area
 
* new sections created as part of the GV Model development to complete the boundaries for each regional area
 
* the digital 1:625&nbsp;000 scale bedrock geological map of the UK (DiGMapGB-625; BGS, 2007c<ref name="BGS 2007c">BRITISH GEOLOGICAL SURVEY. 2007c. DiGMapGB-625&nbsp;—&nbsp;BGS digital geology 1:625&nbsp;000 scale. [http://www.bgs.ac.uk/products/digitalmaps/digmapgb_625.html/ www.bgs.ac.uk/products/digitalmaps/digmapgb_625.html]      </ref>)
 
* the digital 1:625&nbsp;000 scale bedrock geological map of the UK (DiGMapGB-625; BGS, 2007c<ref name="BGS 2007c">BRITISH GEOLOGICAL SURVEY. 2007c. DiGMapGB-625&nbsp;—&nbsp;BGS digital geology 1:625&nbsp;000 scale. [http://www.bgs.ac.uk/products/digitalmaps/digmapgb_625.html/ www.bgs.ac.uk/products/digitalmaps/digmapgb_625.html]      </ref>)
* the digital 1:250&nbsp;000 scale Marine Bedrock Map of the UK continental shelf (DiGRock250k; BGS, 2013<ref name="BGS 2013">BRITISH GEOLOGICAL SURVEY. 2013. DiGRock250k&nbsp;—&nbsp;Marine bedrock 1:250&nbsp;000 scale. [https://www.bgs.ac.uk/products/offshore/DigRock250.html/ www.bgs.ac.uk/products/offshore/DigRock250.html]</ref> for coastal areas of Wales and the Bristol Channel and,* digital elevation, bathymetric and topographic data.
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* the digital 1:250&nbsp;000 scale Marine Bedrock Map of the UK continental shelf (DiGRock250k; BGS, 2013<ref name="BGS 2013">BRITISH GEOLOGICAL SURVEY. 2013. DiGRock250k&nbsp;—&nbsp;Marine bedrock 1:250&nbsp;000 scale. [https://www.bgs.ac.uk/products/offshore/DigRock250.html/ www.bgs.ac.uk/products/offshore/DigRock250.html]</ref> for coastal areas of Wales and the Bristol Channel and,
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* digital elevation, bathymetric and topographic data.
  
 
UK3D v2015 is a national-scale fence diagram of intersecting sections developed by BGS through its NERC-funded National Capability programme and with support from Radioactive Waste Management Limited and the Environment Agency (Mathers et al., 2014<ref name="Mathers 2014">MATHERS, S J, TERRINGTON, R L, WATERS, C N, and THORPE S. 2014. The construction of a bedrock geology model for England and Wales. ''British Geological Survey Open Report''. OR/14/039      </ref>; Waters et al., 2015<ref name="Waters 2015">WATERS, C N, TERRINGTON, R L, COOPER, M R, RAINE, R J, and THORPE S. 2015. The construction of a bedrock geology model for the UK: UK3D_v2015. ''British Geological Survey Open Report''. OR/15/069.</ref>). UK3D v2015 provides a regional- to national-scale geological characterisation of the bedrock in the upper 1.5 to 6 km of the crust that compliments DiGMapGB-625 (BGS, 2007c<ref name="BGS 2007c"></ref>), the digital version of the 1:625&nbsp;000 bedrock geological map of the UK (BGS, 2007a<ref name="BGS 2007a">BRITISH GEOLOGICAL SURVEY. 2007a. 1:625&nbsp;000 scale bedrock geology south. ''British Geological Survey map published 2007''.</ref>, b<ref name="BGS 2007b">BRITISH GEOLOGICAL SURVEY. 2007b. 1:625&nbsp;000 scale bedrock geology north. ''British Geological Survey map published 2007''.</ref>).
 
UK3D v2015 is a national-scale fence diagram of intersecting sections developed by BGS through its NERC-funded National Capability programme and with support from Radioactive Waste Management Limited and the Environment Agency (Mathers et al., 2014<ref name="Mathers 2014">MATHERS, S J, TERRINGTON, R L, WATERS, C N, and THORPE S. 2014. The construction of a bedrock geology model for England and Wales. ''British Geological Survey Open Report''. OR/14/039      </ref>; Waters et al., 2015<ref name="Waters 2015">WATERS, C N, TERRINGTON, R L, COOPER, M R, RAINE, R J, and THORPE S. 2015. The construction of a bedrock geology model for the UK: UK3D_v2015. ''British Geological Survey Open Report''. OR/15/069.</ref>). UK3D v2015 provides a regional- to national-scale geological characterisation of the bedrock in the upper 1.5 to 6 km of the crust that compliments DiGMapGB-625 (BGS, 2007c<ref name="BGS 2007c"></ref>), the digital version of the 1:625&nbsp;000 bedrock geological map of the UK (BGS, 2007a<ref name="BGS 2007a">BRITISH GEOLOGICAL SURVEY. 2007a. 1:625&nbsp;000 scale bedrock geology south. ''British Geological Survey map published 2007''.</ref>, b<ref name="BGS 2007b">BRITISH GEOLOGICAL SURVEY. 2007b. 1:625&nbsp;000 scale bedrock geology north. ''British Geological Survey map published 2007''.</ref>).
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In addition to using the existing UK3D sections, new sections along the edges of each of the regional areas were constructed to provide complete bounding sections around each model area. These were developed following the same methodology as the UK3D v2015 model.
 
In addition to using the existing UK3D sections, new sections along the edges of each of the regional areas were constructed to provide complete bounding sections around each model area. These were developed following the same methodology as the UK3D v2015 model.
  
In coastal areas of Wales and the Bristol Channel, a simplified version of the BGS 1:250&nbsp;000 scale DiGRock250 marine bedrock geology map (BGS, 2013<ref name="BGS 2013"></ref>) has been developed to show the distribution of rock types near the sea bed.
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In coastal areas of Wales and the Bristol Channel, a simplified version of the BGS 1:250&nbsp;000 scale DiGRock250 marine bedrock geology map (BGS, 2013<ref name="BGS 2013">B</ref>) has been developed to show the distribution of rock types near the sea bed.
  
 
Topographic maps and terrain data have also been used in the model construction. Topographic maps for regions in England and Wales were derived from Ordnance Survey Open Data available at 1:250&nbsp;000 scale<ref group=note>https://www.ordnancesurvey.co.uk/business-and-government/products/strategi.html</ref>. For the Northern Ireland model, suitable open access topographic data was not available at the time of model development and 1:250&nbsp;000 scale OS Northern Ireland (OSNI) topographic data has been used under licence<ref group=note> https://mapshop.nidirect.gov.uk/Catalogue/Digital-products/Raster-mapping/1-250-000-raster-mapping</ref>.
 
Topographic maps and terrain data have also been used in the model construction. Topographic maps for regions in England and Wales were derived from Ordnance Survey Open Data available at 1:250&nbsp;000 scale<ref group=note>https://www.ordnancesurvey.co.uk/business-and-government/products/strategi.html</ref>. For the Northern Ireland model, suitable open access topographic data was not available at the time of model development and 1:250&nbsp;000 scale OS Northern Ireland (OSNI) topographic data has been used under licence<ref group=note> https://mapshop.nidirect.gov.uk/Catalogue/Digital-products/Raster-mapping/1-250-000-raster-mapping</ref>.

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