| An Improved Direction Relation Detection Model for Spatial Objects |
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| 作者姓名： | FENGYucai YIBaolin |
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| 作者单位： | FENGYucai,Ph.Dsupervisor,SchoolofComputerScienceandTechnology,HUST,Guanshan,Wuhan430074,China. |
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| 基金项目： | FundedbyHi techResearchandDevelopmentProgramofChina (No.2 0 0 1AA1 351 90 0 2 ) |
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| 摘 要： | Direction is a common spatial concept that is used in our daily life. It is frequently used as a selection condition in spatial queries. As a result, it is important for spatial databases to provide a mechanism for modeling and processing direction queries and reasoning. Depending on the direction relation matrix, an inverted direction relation matrix and the concept of direction pre- dominance are proposed to improve the detection of direction relation between objects. Direction predicates of spatial systems are also extended. These techniques can improve the veracity of direction queries and reasoning. Experiments show excellent efficiency and performance in view of direction queries.
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| 关 键 词： | 空间数据库 地理信息系统 直接相关性 关联矩阵 |
| 收稿时间： | 28 March 2004 |
An improved direction relation detection model for spatial objects |
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| FENGYucai YIBaolin.An Improved Direction Relation Detection Model for Spatial Objects[J].Geo-Spatial Information Science,2004,7(4):297-302. |
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| Authors: | Feng Yucai YI Baolin |
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| Institution: | (1) School of Computer Science and Technology, HUST, Guarnshan, 430074 Wuhan, China |
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| Abstract: | Direction is a common spatial concept that is used in our daily life. It is frequently used as a selection condition in spatial queries. As a result, it is important for spatial databases to provide a mechanism for modeling and processing direction queries and reasoning. Depending on the direction relation matrix, an inverted direction relation matrix and the concept of direction pre- dominance are proposed to improve the detection of direction relation between objects. Direction predicates of spatial systems are also extended. These techniques can improve the veracity of direction queries and reasoning. Experiments show excellent efficiency and performance in view of direction queries. |
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| Keywords: | spatial databases geographic information systems direction relations direction relation matrix |
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