中文摘要：

在充分认识体素的基本概念和特点的基础上,分析了几种常见的体素模型,主要讨论了体素在虚拟地理环境构建中三维地形和自然现象的模拟、地理过程的表达、基于地理环境的空间分析等方面的应用和研究,并对建立基于体模型的虚拟地理环境进行了探讨。

英文摘要：

A Virtual Geographical Environment is the expression and simulation of a geo- graphical environment. It not only includes the simulation of the terrain surface information, but includes natural phenomena geospatial and processing simulation . 3D terrain visualiza- tion is an indispensable part of Virtual Geographic Environment. Due to the nature of two- dimensional features it is difficult , to realistically simulate real three-dimensional volumes based on the traditional ＂Face model＂ typically used to build a virtual geographic environ- ment . In this paper, we fully explore the basic concepts of voxels and features, based on the analysis of several common voxel models. We focus on the voxels in a virtual three-dimen- sional topography of the geographical environment for the simulation of natural phenomena, geographical expression of the process, spatial analysis based on geographic environment and applications. The virtual geographic environment based nn ＂volume model＂ is dicusssed.