Real-time visualization of virtual geographic environment using the view-dependent simplification method
A real-time virtual geographic environment (VGE) can serve as interactive,intuitive visualization tools for exploring,analyzing,synthesizing,and simulating multi dimension geo-data and complex geo-phenomena.The VGE scene can be constructed by terrain models,building models,and natural gaseous phenomena models.This paper used a viewdependent simplification method to improve the rendering efficiency of the VGE scene.The continuous level of detail technique(C-LOD) algorithm was adopted to achieve high frame rates by generating an approximate view-dependent triangulation of large terrain scene.Meanwhile image-based rendering techniques such as the imposter billboard were used to speed up the visualization of 3D object models (e.g.,3D building,3D trees,smoke,cloud and so on).Using the Pearl River Delta (PRD) region in China as a case area,the visualization environment was built to support real-time rendering of larger-scale geo-scene.Experiment results prove that the scheme addressed in the paper can improve the overall efficiency.
virtual geographic environment view-dependent simplification real-time Level of Detail
Zhu Jun Lin Hui Xu Bingli Hu Ya
Institute of Space and Earth Information Science,The Chinese University of Hong Kong,Shatin,Hong Kon Institute of Space and Earth Information Science,The Chinese University of Hong Kong,Shatin,Hong Kon
国际会议
第16届国际地理信息科学与技术大会(16th International Conference on GeoInformatics and the Joint Conference)
广州
英文
2008-06-28（万方平台首次上网日期，不代表论文的发表时间）