VGE is a virtual environment to present not only static objects, such as buildings, but also dynamic processes, for instance pollutant dispersion.

• 指出虚拟地理环境是在空间数据库和地理模型管理基础上构建的、同时表达地理静态和模拟动态现象的、面向多用户的分布式协同虚拟环境。