【摘要】 拓扑关系的细化计算是生产实践中提出的新的需求,代表了当今空间关系理论研究的趋势。本文从1∶5万数据更新质量检查的实际应用需求出发,研究提出线目标间复杂拓扑关系的分解-组合计算思路;讨论直线段拓扑关系计算的改进平面扫描计算方法;建立根据直线段拓扑关系推断局部拓扑关系的基本规则;给出由局部拓扑关系组合描述线目标间全局拓扑关系的拓扑链模型;将该方法应用于国家1∶5万地图数据库更新中,取得良好的效果。更多还原

【Abstract】 The refined calculation of topological relationships is the new requirement of practice and application,which represents the trend of the research on spatial relationship.To meet the heavy demands in checking the data quality of national spatial database at the scale of 1∶50,000,this paper investigates and advances the idea of line-decomposed-assembled to calculate the complicated topological relationships between line objects.The improved plane sweep arithmetic for the calculation of topological relationships between line segments is discussed.The rules for judging the local topological relationships based on that of line segments are set up.The topological chain model to describe the whole topological relationships by local topological relationships is given.The method has been applied to the detection of spatial conflict in the checking of data quality of national spatial database,achieved better effects.更多还原