建立三维矢量数据模型拓扑关系的关键算法  

Key Algorithm for Creating Topology Relation of Three Dimension Vector Data Model

作　　者：胡小兵[1] 

机构地区：[1]长沙电力学院教务处,湖南长沙410077

出　　处：《湖南大学学报（自然科学版）》2003年第3期24-26,共3页Journal of Hunan University:Natural Sciences

摘　　要：讨论了如何判断基本几何对象之间的拓扑关系,从分析曲线与曲面相交3种可能情况出发,将该3种情况转化为一种情况,通过以曲线与曲面的交点是否在曲面内为判断是否相交的依据,使建立3维矢量数据模型拓扑关系的关键问题,曲线与曲面想相交问题得以实现.The problem of how to estimate the topology relation among the three status of intersection between the curve and the twodimensional curves was discussed.Then these status were converted into one status.According to the intersection between the curve and the twodimensional curves in or not in the twodimensional curves, it can be estimated whether intersection is between them or not.Thus it is easy for the key problem of creating topology relation of three dimension vector date model to be resolved. 

关 键 词：地理信息系统 拓扑关系 三维矢量数据模型 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]