虚拟现实的三维时态GIS模式研究  

Research on 3D-Tense-GIS Pattern Based on Virtual Reality

作　　者：唐海涛[1] 王船海[1] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,南京210098

出　　处：《地球信息科学》2008年第2期206-213,共8页Geo-information Science

基　　金：国家支撑计划项目(2006BAC05B02)

摘　　要：三维场景是三维地理信息系统中人机交互的主界面。本系统中包括地球和流域两个场景,其中流域的两大基本要素是地形和河道。系统将DEM地形和河网表达在三维场景中,通过读取连续时段的河网格网数据进行水流的动态演示,体现时态GIS的历史回溯性;同时与虚拟现实结合,在场景中实时增加模型,并可以对其选择,变换,删除等。最后实现了对地形任意点的位置查询和不同时刻河流各格网点的水位、流速和流向的查询等功能,具备良好的人机交互性。The 3 D scene is the main interactive interface of 3 D GIS, and has an Earth scene and a valley scene, taking terrains and rivers as their two basic elements. It displayed DEM and river network on the 3 D scene of the system. The water flow is displayed dynamically by reading the data of river network on sequential time, which represented the historic trace of tense-GIS. Also, we could add models which can be selected, transformed, removed and so on anytime on the scene by the integration of it with virtual reality. The functions of the query of terrain position at will and water level, water flow velocity and direction of any node of the river network at different time intervals were implemented which have a good capability of interactivity.

关 键 词：数字高程模型 河网 虚拟现实 三维地理信息系统 时态地理信息系统 

分 类 号：P208[天文地球—地图制图学与地理信息工程] TP391.9[天文地球—测绘科学与技术]