【摘要】 该文介绍了虚拟现实系统的特征、分类和软件、硬件结构等相关技术以及基于微机系统开发的虚拟电子沙盘系统。详细描述了虚拟现实技术在电子沙盘中的应用 ,在虚拟环境下地形的三维显示 ,人机交互时改变地形观察的方位、角度和距离 ,沿一路径视觉模拟 ,航空照片、卫星照片、扫描图片的三维显示以及跨图幅大范围三维漫游观察的算法处理与实现。更多还原

【Abstract】 This paper introduces characteristics?classification of virtual reality; its interactive technology of the software and hardware’s structure and virtual topography system based on computer’s system.It describes in detail virtual reality’s use in electronic sand table and algorithm handling and realization of topography three-dimensional display under virtual environment; when human-computer’s mutual changing direction?angle?distance of topography watching; vision simulation along any route; three-dimensional display of aerial?satellite?scanning photograph and three-dimensional roaming watching of spanning pattern in big scope.更多还原