Adopting Client/Server architecture, based on hypertext transfer protocol and oriented object method, and using such developing program tools as Visual C++, OpenGLand Active Template Library, the authors have developed a global virtual terrain application system. Database organization functions in the server as well as data transmission and real-time display mechanism are dealt with in this paper. Pyramid data structure and wallet analysis principles are introduced to simplify data. The problem as to how to construct highly efficient indexes and algorithms for displaying and operating 3D landscape on the browser is also discussed. Finally a test is made by using different levels of detail data.
张立强, 杨崇俊, 刘冬林, 杨洪志. 面向数字地球的网络三维虚拟地形结构设计和交互技术研究[J]. 国土资源遥感, 2003, 15(1): 59-64.
ZHANG Li-qiang, YANG Chong-jun, LIU Dong-lin, YANG Hong-zhi. A STUDY OF ARCHITECTURE DESIGNING AND INTERACTIVE TECHNIQUES OF WEB3D VIRTUAL TERRAIN BASED ON DIGITAL EARTH. REMOTE SENSING FOR LAND & RESOURCES, 2003, 15(1): 59-64.
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