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A Voronoi-based spatial algebra for spatial relations

Progress in Natural Science:Materials International 2002年第7期 50-58页

作者： LI Zhilin , ZHAO Renliang and CHEN Jun(1. Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, Hong Kong, China 2. National Geometries Center of China, Beijing 100044, China) Department of Land Surveying and Geo-Informatics，The Hong Kong Polytechnic University，Hong Kong，China Department of Land Surveying and Geo-Informatics，The Hong Kong Polytechnic University，Hong Kong，China National Geometrics Center of China，Beijing 100044，China National Geometrics Center of China，Beijing 100044，China

spatial relation between spatial objects is a very important topic for spatial reasoning, query and analysis in geographical information systems (GIS). The most popular models in current use have fundamental deficiencies in theory. In this paper, a generic algebra for spatial relations is presented, in which (i) appropriate operators from set operators (i. e. union, intersection, difference, difference by, symmetric difference, etc. ) are utilized to distinguish the spatial relations between neighboring spatial objects; (ii) three types of values are used for the computational results of set operations-content, dimension and number of connected components; and (iii) a spatial object is treated as a whole but the Voronoi region of an object is employed to enhance its interaction with its neighbours. This algebra overcomes the shortcomings of the existing models and it can effectively describe the relations of spatial objects.

关键词： spatial relations Voronoi-based algebra spatial algebra topological relations.

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Application of rough set-based analysis to extract spatial relationship indicator rules： An example of land use in Pearl River Delta

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Journal of Geographical Sciences 2011年第1期21卷 101-117页

作者： GE Yong CAO Feng DU Yunyan LAKHAN V. Chris WANG Yingjie LI Deyu State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources Research CAS Beijing 100101 China Department of Earth and Environmental Sciences University of Windsor ON N9B 3P4 Canada School of Computer & Information Technology of Shanxi University Taiyuan 030006 China

spatial relations,reflecting the complex association between geographical phenomena and environments,are very important in the solution of geographical issues. Different spatial relations can be expressed by indicators which are useful for the analysis of geographical issues. Urbanization,an important geographical issue,is considered in this paper. The spatial relationship indicators concerning urbanization are expressed with a decision table. Thereafter,the spatial relationship indicator rules are extracted based on the application of rough set theory. The extraction process of spatial relationship indicator rules is illustrated with data from the urban and rural areas of Shenzhen and Hong Kong,located in the Pearl River Delta. Land use vector data of 1995 and 2000 are used. The extracted spatial relationship indicator rules of 1995 are used to identify the urban and rural areas in Zhongshan,Zhuhai and Macao. The identification accuracy is approximately 96.3%. Similar procedures are used to extract the spatial relationship indicator rules of 2000 for the urban and rural areas in Zhongshan,Zhuhai and Macao. An identification accuracy of about 83.6% is obtained.

关键词： rough set theory spatial relations spatial indicator rules land use change

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Supporting Information Extraction from Visual Documents

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Journal of Computer and Communications 2016年第6期4卷 36-48页

作者： Giuseppe Della Penna Sergio Orefice Department of Information Engineering Computer Science and Mathematics University of L’Aquila Via Vetoio L’Aquila Italy

Visual Information Extraction (VIE) is a technique that enables users to perform information extraction from visual documents driven by the visual appearance and the spatial relations occurring among the elements in the document. In particular, the extractions are expressed through a query language similar to the well known SQL. To further reduce the human effort in the extraction task, in this paper we present a fully formalized assistance mechanism that helps users in the interactive formulation of the queries.

关键词： Information Extraction spatial relations Visual Appearance

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从空间完整性约束导出触发器ECA规则

从空间完整性约束导出触发器ECA规则

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第二十届全国数据库学术会议

作者：熊伟张巨景宁国防科技大学电子科学与工程学院

引言修改空间数据库常常导致对多个表中大量记录的更新,需要提供一种控制机制以维持完整性约束,如在GIS应用中引入"商业规则"来减少数据录入错误,但目前GIS未能很好地实现空间数据库完整性约束。因此新一代的GIS产品ArcGIS 9.0声称

关键词： spatial integrity constraints spatial relations Trigger ECA rules

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Theoretical Models of Space and Its Philosophical Category

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Journal of Philosophy Study 2022年第4期12卷 185-202页

作者： Leonid Tchertov International Association for Semiotics of Space and Time BonnGermany

Diverse concepts of space developed in history of natural philosophy,mathematics,physics,and other natural or cultural studies form theoretical models of spatial relations,given in human’s *** diversity is due not only to the multiplicity of philosophical and methodological approaches to the concept of space,but also to the variety of ways,in which spatial relationships can be *** variety gives a possibility to distinct autonomous spaces of different types with diverse sets of properties as well as separate spaces with their own ordinal,metrical,and sequential ***,various ways of space semiotization in culture generate different types of autonomous and separate spaces:written texts,maps,pictures,chessboards,*** the same time,all particular notions of space are included in a general logical *** volume and content are covered by the philosophical category of *** general category cannot be reduced to mathematical,physical,or other concepts of space elaborated in particular sciences,however,it serves as a philosophical basis for their comparison.

关键词： spatial relations autonomous and separate spaces variety theoretical model philosophical category

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