Volume 25 Issue 2
Feb.  2000
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SUN Hongjun, DU Daosheng, LI Zhenghang, ZHOU Yongqian. Study on the 3D Visualization of Earth Figure[J]. Geomatics and Information Science of Wuhan University, 2000, 25(2): 158-162.
Citation: SUN Hongjun, DU Daosheng, LI Zhenghang, ZHOU Yongqian. Study on the 3D Visualization of Earth Figure[J]. Geomatics and Information Science of Wuhan University, 2000, 25(2): 158-162.
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Study on the 3D Visualization of Earth Figure

  • 1 AVIC Institute of Technical Engineering, Box 2411, Beijing, China, 100086;

  • National Laboratory for Information Engineering in Surveying, Mapping and Remote Sensing, WTUSM, 129 Luoyu Road, Wuhan, China, 430079;

  • 3 School of Geo-science and Surveying Engineering, WTUSM, 129 Luoyu Road, Wuhan, China, 430079

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  • Received Date: May 30, 1999
  • Published Date: February 04, 2000
    Graphical Abstract
    • Abstract
  • Three dimensional earth figure is dynamically expressed by utilizing 3D visualization theory and OpenGL technique. In this paper, the global data structure and data transformation, modeling the digital earth, the method for calculating normal vector as well as the rapid transformation of global grid data into triangulated network data are studied and realized. The experimental data of global terrain is from The JGP95E 5' Global Topographic Database edited by The Defense Mapping Agency and NASA/Goddard Space Flight Center(GSFC), and the height above geodetic datum calculated by WDM94 model which was provided by WTUSM. Experimental results indicated that the mathematical model of global terrain and earth figure and their visualization methods are reasonable and practical. The visualization model created by means of the method mentioned above could be rotated and enlarged. Also the vertical scale could be changed in order to display the small undulation of the earth surface.
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