摘要
在GIS中,空间物体间的拓扑关系是基本的空间关系之一,直接利用ORACLE SPATIAL提供的简单的空间关系查询操作算子,对九交模型所描述的任意两2维空间的不自相交的线目标间的拓扑关系的判断设计算法,并进行试验验证,实现两线目标间的33种空间拓扑关系的判断。基于ORACLE SPATIAL的线/线目标间空间拓扑关系判断的实现必将推动基于ORACLE SPATIAL的GIS系统的查询、分析和数据更新的研究进展。
The formalization and judgment of spatial topological relations plays important roles in modeling spatial data, spatial query, spatial analysis, spatial reasoning, updating spatial data. The paper introduces 9-intersection model and then according to its characteristics in computational model and the studies on the Oracle Spatial data including their model.storages, indexes and queries, the deficiencies of spatial relation operating of Oracle Spatial in differentiating binary topological relation by 9-intersection model are referred. Aiming at the deficiencies, the paper gives countermeasures and computational methods arc designed.
出处
《测绘学报》
EI
CSCD
北大核心
2006年第1期77-82,共6页
Acta Geodaetica et Cartographica Sinica
关键词
空间拓扑关系
九交模型
对象关系型数据库
spatial topological relations
9-intersection model
object-relation database
