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The functional, graphics and hardware requirements for 3-D modelling and analysis of multiple geophysical datasets have been addressed. An interactive, graphics-based software package has been developed for 3-D interpretation of multi-parameter data. The basic strategy has been to integrate image-based techniques for the analysis and correlation of datasets with interactive 3-D modelling. The software package, named MGIS-3D (Multi-parameter Geophysical Interpretation System), concentrates on the interpretation of gravity and magnetic data in conjunction with seismic, borehole and geological control. 3-D data analysis and correlation techniques developed during the project represent a new approach and offer considerable advantages over traditional 2-D techniques. Geophysical fields can be displayed as 3-D triangular-faceted surfaces which can be viewed from any direction using the hardware graphics facilities of the workstation. Shaded-relief effects can be created using the hardware lighting functions. Various combinations of data can be posted to different views in a multi-window environment to investigate correlations between datasets. Lineaments associated with faults and important structural trends can be defined simultaneously from several scenes and stored in the database. Rasterised geological maps can be draped onto the 3-D terrain surface. Downhole lithostratigraphic information can be displayed as coloured bands down the length of a borehole.

Additional information

Authors: DABEK Z K, British Geological Survey, Keyworth, Nottingham (GB);WILLIAMSON J P, British Geological Survey, Keyworth, Nottingham (GB);LEE M K, British Geological Survey, Keyworth, Nottingham (GB);GREEN C A, British Geological Survey, Keyworth, Nottingham (GB);EVANS C J, British Geological Survey, Keyworth, Nottingham (GB)
Bibliographic Reference: EUR 13575 EN (1991) 140 pp., MF, ECU 8
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