Research And Implementation Of Visualization In3-D Geological Mapping

Geologic3-D visualization technology has been one of the more important areas of geological survey work all over the world. Massive geological data collected by the use of geological body in accordance with the requirements of the specific data format, carrying the geological body characteristics of the geological researchers need fixed data model structure. These techniques will contain detailed information about the data model of the geological body in the form of3-D objects in scene and show to the researchers who care about these. This kind of work for the staff engaged in geological research has a very important significance. By observing and analyzing the3-D geological model, researchers can ultimately make optimal decisions. This shows intuitive, accurate, rapid, and practical work to improve the production efficiency in a considerable extent. This way, guiding the exploration and construction, and very objective convenience conducted found that the mineral resources, development of mineral working.This thesis refers to the status quo, relying on3-D geological mapping, and explores the ground in the field of high frequency GOCAD data format into fixed custom data format. Using graphics library widely used in the field of visualization, such as the open source graphics library VTK, or commercial graphics library such as Coin3D and OpenInventor, We fixed format data to the visual display, calculation and analysis. Focus on various visualization techniques used in the geological mapping (such as rendering, data filtering, spatial analysis, spatial data processing, etc.), and the implementation of the visualization of3-D geological mapping. This paper discusses the following:1) Explore and contrast the GOCAD file format and VTK file format often used in the field of geosciences, compare the different characteristics between them, such as data type correspondence relationship, the attribute information be able to carry. Provide theoretical support for the data format conversion.2) Discuss which technology to be needed in3-D geological mapping. Including plane cutting, body cutting, explode, box clip, prism clip, even polylines cutting in spatial analysis, improving disadvantages of GOCAD s poor support in Chinese chars, the solutions of correcting the way of GOCAD inconsistent texture maps, the management of the rendering scene, the way to show the Chinese label, the way to hold all information in Gocad object files.3) In the Microsoft Windows platform, integrate these technologies, and implement the system design. Using the appropriate development tools (Microsoft Visual Studio2010), with MFC (Microsoft Foundation Class Library) which has been already quite mature, binding doc-view architecture, complete the visualization part of the design and implementation of the3-D geological mapping system.Most of the visual field of the geological body is through2D to show in China. Even if there is the individual imitation3D software, it is also in its infancy. It is not very mature in the commercialization of the real3-D visualization of geological field. Addition, it is not most widely used in geological field, but due to its open source nature, its customizability and scalability has the incomparable advantage than other commercial graphics library. So this paper directly starts from true3-D, research the methods of data convert between different format, and the display and show of the data model files.By discussing and implementing of these techniques used in3-D geological mapping, we provide a feasible way for the visualization of specific geological research areas.