| 引用本文: | 钟志农,景宁,李军.空间查询语言中拓扑关系的定义.[J].国防科技大学学报,2003,25(5):58-62.[点击复制] |
| ZHONG Zhinong,JING Ning,LI Jun.Topological Relationships in Spatial Query Languages[J].Journal of National University of Defense Technology,2003,25(5):58-62[点击复制] |
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| 空间查询语言中拓扑关系的定义 |
| 钟志农, 景宁, 李军 |
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(国防科技大学 电子科学与工程学院，湖南 长沙 410073)
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| 摘要: |
| 拓扑关系是一种重要的空间关系，被广泛应用于空间查询和空间分析中。因此定义一个完备、互斥且可以嵌入到空间查询语言中的命名拓扑关系集合有着非常重要的意义。当前，对拓扑关系集合的定义还不能描述那些由点、线或面等不同维几何对象构成的复杂空间对象之间的拓扑关系。针对目前拓扑关系研究的不足，引入了混合几何对象的概念，基于OpenGIS SQL规范(OpenGIS Simple Features Specification for SQL)，定义了一个拓扑关系集合：｛disjoint, touches, within, crosses, overlaps, contains, equal｝。它扩充了OpenGIS SQL规范中拓扑关系的定义和范畴，具有完备性和互斥性，为空间查询语言中的拓扑关系的定义提供了一个统一的框架。 |
| 关键词: 空间查询语言 拓扑关系 复杂空间对象 完备性 互斥性 |
| DOI： |
| 投稿日期：2003-05-23 |
| 基金项目: |
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| Topological Relationships in Spatial Query Languages |
| ZHONG Zhinong, JING Ning, LI Jun |
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(College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| Topological relationships are important spatial relationships, and used in numerous practical applications that involve spatial query and spatial analysis. So it is essential to use formal methods to identify and define a complete and mutually exclusive topological relationship set that can be embedded in spatial query languages. Now, the topological relationships that have been defined cannot represent the topological relationships between the two complex spatial features arbitrarily composed of points, lines and/or polygons, thus the researches on topological relationships are not complete. We introduce the formal definition of mixed geometry, and define a topological relationship set: ｛disjoint, touches, within, crosses, overlaps, contains, equal｝.The set, extending the definitions of topological relationships in ‘OpenGIS Simple Features Specification for SQL’， is complete and exclusive, and can be taken as a unified framework to define topological relationships in spatial query languages. |
| Keywords: spatial query language topological relationship complex spatial feature completeness exclusiveness |
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