Research On CAD Model And Visualization For Measured Data

Processing of the geological exploring data and the visualization of geological structure are important problems on geophysics exploration. With the stratumtous geological body as the object, The magnanimity data received from the geological exploring were processed first. A data model was presented for the geological body and the 3D visualization for the geological structure was mainly researched.The development of the visualization technology and the geological drawing technique were first introduced in the paper. Then the geological structure visualization models were studied. Based on the characteristics of the geological exploring data, a method for establishing data model was presented, in which the triangle network was combined with the quadrangle network. At last, the geologic maps needed for geological research were drawn through the GDI(Graphics Device Interface) and the 3D visualization system model was established for stratumtous geological body. Base on the achievments mentioned above, a software system was developed which can be used independently without relying on any software platform. This system was composed of three parts including data management, data processing and graphical display. In the module of data management, the ADO programming technology was combined with Access database to sort and manage the data. In data processing module, the MATLAB and VC++ Co-programming scheme was presented in which the original data weretransformmed geometrically so that the 3D data model was established. The graphical display module was developed on the base of OpenGL and VC platform with which the 2D geological drawings and 3D geological drawings could be accomplished. In the end of the paper, an example was given with the measured data from an iron mine. The results shows that the software system is practical and satisfactory.With the aims of good portability, short periodicity and practicability in the subject, the advantages of existing softwares were combined with together. A software system was developed with seamlessly integrating the existing softwares and the new written code. As a result, a practical system and method were pesented which could do it's bit for the visualization technology in geological field. In addition, it can also promote the development of visualization technology in other fields.