Because of the defects of present 3D Geographic Information System and Virtual Reality System,a VR system with the functions of 3D scene roaming,Extern database querying and space analyzing was developed based on dynamically updating GIS data.

• 针对现有三维G IS系统以及虚拟现实系统存在的问题,基于可动态更新G IS数据开发了具备三维场景漫游、外部数据库查询和部分空间分析功能的虚拟现实系统。