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Research of 3D Modeling and Visualization about Geological Mass

Author: ShaoZuo
Tutor: GuanJianHe
School: Chinese Geology University (Beijing)
Course: Applied Computer Technology
Keywords: Geological information Three-dimensional modeling Visualization OpenGL
CLC: P208
Type: Master's thesis
Year: 2008
Downloads: 435
Quote: 5
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Abstract


In recent years, with the development of information technology in GIS and geospatial 3D visualization technology in terms of geological body plays an increasingly large role. Use of visual simulation technology based on GIS 3D dynamic scene modeling technology and graphic image processing technology, the development of a true and comprehensive virtual environment system on a particular geological area, the geological scientists were able to be more intuitive understanding of geological information in the study or the law of the overall distribution of the work area, and a deeper understanding of the occurrence, development and the impact of a variety of geological phenomena. Geological Engineering complex geological geological information can be seen as a function of the three-dimensional space, using a variety of measured data were analyzed to establish the corresponding surface fitting function, and then using the computer to create a three-dimensional geological model to achieve visually express geological information the purpose of the distribution of geologic body. This paper analyzes the Geological Object Modeling and visualization of key technical issues, and a simple description of the initial development research in the the geological body three-dimensional modeling and visualization. For some key technologies research and development process in the system, a large number of experiments and comparison, and as much as possible to take the highly technical, high-value research techniques and methods. 1, discrete data interpolation and fitting a variety of geological information in complex geological body, including surface topography, stratigraphy interface faults, can be seen as a function of the three-dimensional space, the fitting function according to existing data establish, the richer the measured data, the more we can depict the true spatial distribution of these information. 2, the three-dimensional data structure of geological body three-dimensional spatial data structure is the basis of engineering geological 3D modeling and visualization, which requires the need to have effective three-dimensional hierarchical data structure. 3, the curved intersection in the presence of a large number of various aspects of the geological body, appear unconformity fault situations such naturally encountered problem intersection between the surfaces. Will encounter in sectional view in Figure surfaces intersection. 4, three-dimensional topology From the geological point of view, the topology is the relationship between the geological objects table, the topology table storage horizon overlying the underlying and cross-cutting and other stratigraphic relationships and geological spatial location relationship. The evaluation of the advantages and disadvantages of the geological model system often determines the topology is used to describe the geological objects. 5, visualization technology engineering geological visualization of complex geological body, the use of computer technology to the engineering investigation data, converted to image intuitive ease of the perspective view and cross-sectional shape of the geological structure interaction analysis of spatial form. Realization of the geological body three-dimensional modeling will be based on the discrete sampling data interpolation and fitting thought, about to discrete data into continuous curves and surfaces, extract the coordinates of the location and parameters of the various geological information obtained by different fitting and interpolation functions geological level (surfaces) and three-dimensional computer graphics geological entity, the expression of the distribution of geological information in the study area. This system will be developed in Visual Studio 2005 C platform, surface fitting algorithm to achieve through the triangular mesh, using OpenGL visualization of data, and allows the user to carry out a series of research operations on the visualization of three-dimensional geological entity such as rotation observed cross-sectional analysis of the selected location. The system will be completed in strict accordance with the specifications of software engineering, the system is divided into distinct modules of various functions.

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CLC: > Astronomy,Earth Sciences > Surveying and Mapping > General issues > Mapping database and information system
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