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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2009, Vol. 30 ›› Issue (1): 132-135.

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Rapid Protracting Arithmetic about Large Scale DEM Data Based on Embedded Environment

Wang Jinyan1,2, He Yizheng2, Xie Jianbin3, Liu Tong3, Zhuang Zhaowen3, Jing Zhongliang4   

  1. 1. School of Electronics and Information Technology, Shanghai Jiaotong University;
    2. China National Aeronautical Electronic Radio Research Institute ;
    3. .School of Electronics Engineering, National University of Defense Technology;
    4. Institute of Aerospace Science and Technology, Shanghai Jiaotong University
  • Received:2007-09-16 Revised:2008-11-18 Online:2009-01-25 Published:2009-01-25
  • Contact: Wang Jinyan

Abstract:

Terrain models are widely used in the fields of aerospace exploration as well as civil and military aviation, such as war field simulation, flight visualization, characteristics matching, special effects in movies and televisions, etc. This article presents a new concept called the sub dataset and proposes an algorithm to realize its data loading rapidly by means of the indexes of flight parameters and longitude and latitude information. By means of this method large scale digital elevation model (DEM) data are loaded and rendered real-time, smoothly and rapidly. Now the method has been used on embedded platform and accomplished some flight emulation experiments.

Key words: embedded environment, digital elevation model, loading, terrain visualization, computer graphics

CLC Number: