GSI3D
From Wikipedia, the free encyclopedia
GSI3D (Geological Surveying and Investigation in 3 dimensions) is a methodolgy and associated software tool for 3D geologic modelling developed by Hans-Georg Sobisch over the last 15 years initially in collaboration with the Geological Survey of Lower Saxony (Germany). The software is written in JAVA and data is stored in extensible mark-up language XML.For the past 5 years the British Geological Survey has been acting as a test bed for the accelerated development of the system. Since its roll-out throughout the Survey GSI3D has started to revolutionise the working practices, data standards and products of a geological survey as a whole.
[edit] A brief outline of the methodology
GSI3D utilizes a Digital Terrain Model, surface geological linework and downhole borehole data to enable the geologist to construct cross sections by correlating boreholes and the outcrops to produce a geological fence diagram. Mathematical interpolation between the nodes along the drawn sections and the limits of the units produces a solid model comprising a stack of triangulated objects each corresponding to one of the geological units present. Geologists draw their sections based on facts such as borehole logs correlated by intuition - the shape 'looks right' to a geologist. This 'looks right' element pulls on the geologists' wealth of understanding of earth processes, examination of exposures and theoretical knowledge gathered over a career in geology.
[edit] References
- Neber, A. & Howahr, M. 2006. Construction and Usage of geological near-surface models with GSI3D - applied (hydro-)geological information for land sites and urban areas. COG 2006, Salzburg, Austria. http://www.geol-ges.at/cog-2006/kurzfassung-neber-howahr.pdf
- Classon, F., Brunotte, E., Sobisch, H.-G. & Neber, A. 2005. Zur dreidimensionalen Modellierung von anthropogenen Ablagerungen in urbanen Räumen am Beispiel des rechtsrheinischen Köln. Geotechnik 2005/2, 93-100.
- Kessler, H. et al. 2005. 3D geoscience models and their delivery to customers: In: Threedimensional geologic mapping for groundwater applications, Workshop extended abstracts, Salt Lake City, Utah, 15 October 2005. Geological Survey of Canada, 2005. p. 39-42. http://www.isgs.uiuc.edu/3DWorkshop/2005workshop/kessler2005.pdf
- Kessler, H. & Mathers, S.J. 2004. Maps to Models. Geoscientist, 14/10, pp. 4-6. http://www.bgs.ac.uk/news/press/mapstomodels.html
- Sobisch, H.-G. 2000. Ein digitales raeumliches Modell des Quartaers der GK25 Blatt 3508 Nordhorn auf der Basis vernetzter Profilschnitte. Shaker Verlag, Aachen.
- Hinze, C., Sobisch, H.-G. & Voss, H-H. 1999. Spatial modelling in Geology and its practical Use. Mathematische Geologie, 4, pp. 51-60.
