文章基本信息

标题：Definitions of natural-language spatial relations: Combining topology and directions
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作者：Du Shihong ; Wang Qiao ; Qin Qiming 等
期刊名称：Geo-spatial Information Science
印刷版ISSN：1009-5020
电子版ISSN：1993-5153
出版年度：2006
卷号：9
期号：1
页码：55-64
DOI：10.1007/BF02826689
出版社：Taylor and Francis Ltd
摘要：Because SQL for querying data from spatial databases is ineffective, the query based on natural or visual language becomes an attractive research field gradually. However, how to define and represent natural languages related to spatial data are still gigantic problems. Because existing models of direction relations can't describe by use of some common concepts. First of all, detailed direction relations are proposed to describe the directions related to the interior of spatial objects, such as “east part of a region”, “east boundary of a region”, and so on. Secondly, by integrating the detailed directions with exterior direction relations and topological relations, several NLSRs are defined, such as “a road goes across the east part of a lake”, “a river goes along the east boundary of a province”, etc. Finally, based on the NLSRs abovementioned, a natural spatial query language (NSQL) is formed to retrieve data from spatial databases.
关键词：geographic information system; topological relations; direction relations; detailed direction relations; natural-language spatial relations