OR/14/045 Appendix 2 - GSI3D model development log
| Price, S J, and Waters, C N. 2014. Model metadata report for Swansea-Neath-Port-Talbot. British Geological Survey Internal Report, OR/14/045. |
3D superficial deposits modelling
DTM:
ASCII version of swan_dtmgrid10k using 20 m cell size
ROCKHEAD:
ASCII version of first_rockhead_final
Derived from digitized hand drawn contours in addition to borehole td and rockhead data corresponding to interpreter code dis. cell size 30 m
BID:
Swan_sobi.bid
All boreholes derived from bgs_borehole_geology and saved in all_boreholes.mdb. query based on interpreter code dis and quarter sheets SS69SE, SS69NE
SS79NW and SS79SW. Missing start heights updated from start_height_change.xls
BLG:
Swan_boge.blg
All boreholes derived from bgs_borehole_geology and saved in all_boreholes.mdb. query based on interpreter code dis and quarter sheets SS69SE, SS69NE
SS79NW AND SS79SW. Missing lithostratigraphy updated from null_lithostratigraphy.xls (updated by colin waters) errors in lithostratigraphy interpretation corrected in all_boreholes.mdb
ASCII EXPORT:
All modelled superficial deposits exported as an ascii grid. Refer to individual grids for cell size. Model calculated using a minimum node distance of 10 m
GSIPR:
| SWANSEA_CORL# | First cross-section profiles drawn |
| SWANSEA_SECTIONS_V1# | Cross-sections updated. Cross-sections named with quarter sheet prefix. Preliminary envelopes drawn. Cross-sections re-ordered in quater sheet order. |
| SWANSEA_SECTIONS_V3# | Helper sections added for individual units including thin til deposits on steep slopes |
| SWANSEA_SECTIONS_FINAL | Final cross-sections and envelopes |
| SWANSEA_SECTIONS_FINAL_BEDROCK | Bedrock added to four boundary cross-sections along the perimeter of the 3D geological model area to visualise geological rockhead beneath |
| QUATERNARY DEPOSITS | Base of bedrock in model corresponds to base of model only. Correlation cross-sections extended to intersect bedrock boundary sections |
| SWANSEA_SECTIONS_V5 | Model review 5th August 2014. Swansea-Neath-Port-Talbot model re-build and metadata reporting |
5th August 2014
S J Price
GSI3D model re-build
PURPOSE: To review the Swansea-Neath-Port-Talbot 3D geological model of superficial depoists. To create a supporting metadata file. To identify opportunities for model revision. This review has not included geological revision of the model. It has reviewed the current state of the model, created a gsipr model dataset and identified areas that need to be addressed for inclusion in the National Geological Framework.
| SWANSEA_V2 GVS | GVS modified from original to include headers for GVS fields. SWANSEA GLEG. GLEG taken from original GSI3D project folder |
| SWANSEA BID | Taken from original GSI3D project folder. Metadata relating to borehole selection and processing described in metadata report |
| SWANSEA BLG | Taken from original GSI3D project folder. Metadata relating to borehole selection and processing described in metadata report |
| SWANSEA_FINAL_MODEL_4_8.gxml | Source of cross-sections and envelopes for rebuild. Note cross-sections were re-named in VERSION 2 (MODEL_V2) of the model to remove Quarter sheet prefixes. Bedrock undifferentiated added. Base of bedrock represents base of model |
| SWANSEA_V5# | gsipr First re-build to create gsipr file using objects from SWANSEA_FINAL_MODEL_4_8.gxml |
| swan_dtmgrid10k.asc | Source raster file for DTM derived from original project Ordnance Survey Landform Profile dataset. Created TIN object in revised model |
| first_rockhead_final.asc | Geological rockhead model considered during 3D geological modelling. Metadata describing derivation in metadata report |