全球地壳结构数据的三维可视化建模与应用
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摘要
利用可视化技术表现地壳结构,形象地模拟地震波在地壳内部的传播,对于增强地震事件解释具有重要意义。通过分析改进的CRUST5.1全球地壳结构数据特征,提出了基于长方体与四棱柱相结合的三维可视化建模方法。利用OpenGL建模技术,建立了全球地壳结构数据的可视化模型,在Delphi中基于OpenGL三维图形库实现了CRUST5.1全球地壳结构数据的三维可视化表达,结合OpenGL的人机交互功能完成了多视角观察以及基于地表剖切线的三维剖切功能。
It is of significance to represent crustal structure and simulate the propagation of seismic wave in crust and mantle with visualization technique for interpreting seismic events efficiently. Based on analysis for improved CRUST5.1 global crustal structure data, the visualization modeling method of combining cuboids with quad-prism is presented, and the visualization model of global crustal structure data is also established with OpenGL modeling techniques. Furthermore, the three-dimension representing of CRUST5.1 crustal structure data, the viewing from different directions and the cutting alone an arbitrary plane have been implemented in Delphi with OpenGL.
It is of significance to represent crustal structure and simulate the propagation of seismic wave in crust and mantle with visualization technique for interpreting seismic events efficiently. Based on analysis for improved CRUST5.1 global crustal structure data, the visualization modeling method of combining cuboids with quad-prism is presented, and the visualization model of global crustal structure data is also established with OpenGL modeling techniques. Furthermore, the three-dimension representing of CRUST5.1 crustal structure data, the viewing from different directions and the cutting alone an arbitrary plane have been implemented in Delphi with OpenGL.
引文
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2Hahn A,Ahrendt H,Meyer J,Hufen J H.A model of magnetic sources within the Earth’s crust compatible with the field meas-ured by the satellite Magsat.Geol Jahrb,Reihe A,1984,75:125～156
3Tani moto T.Crustal structure of the Earth.In:Global EarthPhysics:A Handbook of Physical Constants,AGU Ref Shelf,vol1,Ahrens TJ.Ed.AGU,Washington,D C,1995.214～224
4Nataf H C,Ricard Y.3SMAC:An apriori tomographic model of the upper mantle based on geophysical modeling.Phys Earth Planet Inter,1996(95):101～122
5Mooney W D,Laske G,Masters T G.CRUST5.1:A global crustal model at5°×5°,Journal of Geophysical Research,1998,103(B1):727～747
6Serón F J.Visualization and finite element techniques for seismic interpretation.Computer&Graphics in Spain,1992,16(4):383～394
7Sheffield T M,Meyer D,Lees J,et al.Geovolume visualization interpretation:Colorin3-Dvolumes.The Leading Edge,1999,18(6):668～674
8Kidd G D.Fundamentals of32D seismic volume visualization.The Leading Edge,1999,18(6):702～709,712
9Dalley R M,等著.3D图像/数据体处理新方法[J].王忠,等译.石油物探译丛,1998,1:43～46
10程朋根,龚健雅,史文中,等.基于似三棱柱体的地质体三维建模与应用研究[J].武汉大学学报(信息科学版),2004,29(4):602～607
11李清泉,李德仁.三维空间数据模型集成的概念框架研究[J].测绘学报,1998,27(4):325～330
12健雅,夏宗国.矢量与栅格集成的三维数据模型[J].武汉测绘科技大学学报,1997,22(1):7～15
13张煜,白世伟.一种基于三棱柱体体元的三维地层建模方法及应用[J].中国图形图象学报(A),2001,6(3):285～290
14朱亚平,杨慧珠,董渊,等.OpenGL技术在地震数据可视化中的应用[J].石油地球物理勘探,2000,35(4):403～414
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