3DGIS中几种多分辨率模型构造算法的性能比较研究  

A Comparative Study on Several Algorithms for Multi-Resolution Modeling

作　　者：谭玉敏[1] 莫智[1] 刘德强[1] 

机构地区：[1]北京航空航天大学 交通科学与工程学院,北京100083

出　　处：《工程勘察》2008年第4期46-48,共3页Geotechnical Investigation & Surveying

基　　金："十一五"863计划专题(2006AA12Z220)资助.

摘　　要：本文对开源3DGIS软件VTP中的三种视点相关多分辨率地形模型生成算—McNally算法、Rottger算法和TopoVista算法进行了比较实验研究。结果表明,在三角形数取1000时,如果使用三角形带绘制,则McNally算法的运行速度最快,如果没有使用,则TopoVista算法最快;Rottger算法在CLOD算法中速度最慢,但是弹跳现象不如其他算法明显,效果要好;当三角形数量大于5000时,Rottger算法的表现始终优于McNally算法。In this paper, a comparative experiment is made to study the three algorithms for multi-resolution modeling, which are McNally algorithm, Rottger algorithm and TopoVista algorithm. The results show that when the number of triangle is set to 1000, McNally algorithm is the fastest. If drawn with triangle trips, the TopoVista algorithm is the fastest. Among the three CLOD algorithms, Rottger algorithm is the slowest, but its bounce phenomenon is the least. When the number of triangles is larger than 5000, Rottger algorithm is always better than McNally algorithm.

关 键 词：多分辨率模型 VTP McNally算法 Rottger算法 TopoVista算法 

分 类 号：P208[天文地球—地图制图学与地理信息工程]