基于数据库的大地形可视化关键技术研究  

Key Technology of Large-scale Terrain Visualization Based on Database

作　　者：李慧[1] 王守尊[1] 曹汉卿[1] 

机构地区：[1]海军工程大学船舶与动力学院,武汉430033

出　　处：《计算机与数字工程》2011年第6期142-145,共4页Computer & Digital Engineering

摘　　要：地形可视化在GIS、虚拟现实等方面有着广泛应用。论文基于Oracle数据库技术,将DEM数据分块、与视点相关的LOD等技术相结合,采用四叉树遍历高程数据,并给出一种误差控制方法,在PC上实现了对海量地形数据的实时漫游。Terrain visualization has been widely used in GIS,VR,etc.In this paper,the database technology of Oracle is combined with DEM partition,multithreading dynamic scheduling technique and view-dependant LOD.Quad-tree data is used to simplify terrain meshes and error evaluation method is also proposed.The walkthrough with large-scale terrain in real-time is finally achieved on PC.

关 键 词：虚拟现实 大地形可视化 四叉树 细节层次模型 实时漫游 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]