Study On The Application Of 3D Geological Modeling And Visualization Methods

With the development of computer graphics, image processing technology, especially the continuous progress that 3D computer graphics have got,which made 3D graphics become a reality in computer.Making more effort to study the model of 3D visualization is significant for the application of the interpretation in the 3D geological structure.Through the establishment of 3D geological modeling, making a variety of geological information can be integrated into the geological model that could improve the accuracy of the geological model. At the same time it provide a variety of geological model to show in 3D space ,which can quickly produce kinds of professional geological map for the actual work.Using volumetric model and facial model where the thesis can be put to build a 3D geological modeling when the thesis analysis the morphology and properties of the geological informations.The thesis use the facial model to implement geological modeling. First,it's necessary to determine the fault plane by the known exploration datas and fitting the various layers or fault facial.Second, The thesis need methods of facial intersect and artificially limit,and then make sure the scope of control that fault plane and each layer.At last, Discrete triangulations that produce by geological layers and fault plane can form some 3D layer models,therefor,a 3D geological mass has been completed by the models.After making a conclusion of the theory and practice of predecessors,the thesis use a facial model method whick based on the delaunay triangulation technology,combined with the Qt which is a cross-platform software and interface functions provided by OpenGL,and then the thesis completed a visualization system for 3D geological modeling. The system can display in slice and cube for some known geological datas in 3D space.The system introduced the way of 3D geological modeling for the 3D geological blocks. This thesis have finished parts of the construction of 3D geological model by using TIN technology and interpolation method.At the same time,it have studied the delaunay triangulation technology for a better 3D geological system.The system can bulid a delaunay network quikly by using the interpolation method.3D geological model of visualization technology have a theoretical and practical significance for further research.