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空间查询中自然语言空间关系与度量空间关系的转换方法研究:以面目标为例 总被引:1,自引:0,他引:1
以面目标为例,首先探讨度量空间关系的描述方法,即拓扑谓词+度量参数,建立拓扑谓词与度量参数之间的对应关系;然后从人的认知角度,分析空间关系的自然语言描述,即拓扑谓词+量词,区分模糊量词和临界量词两类量词,并分别用来描述邻近拓扑谓词相互转化过程中的定量变化和定性变化;最后,分析度量参数与量词之间的关联关系,试图建立空间查询中度量空间关系与自然语言空间关系之间的联系,从而更好地应用于空间查询.Abstract: Spatial relations between spatial entities can be obtained by two means. One is computed and obtained by spatial data, and the other is obtained by human spatial cognition. So, they are named as metric spatial relations and natural-language spatial relations, respectively. This paper is focused on filling the gap between these two kinds of spatial relations. For this purpose, regions are taken as example, and three steps are included. Metric spatial relations ore first depicted by combining topological predicates with metric parameters, where a mapping is built between the topological predicates and the metric parameters. Second, natural-language spatial relations are represented by combining topological predicates with quantifiers, where quantifiers are differentiated into two types:vague quantifiers and critical quantifiers. They are respectively used to describe quantitative and qualitative change in the process of the transformation between neighboring topological predicates. Finally, the association between metric parameters and quantifiers is further illustrated and analyzed by a questionnaire. With these three steps, the linkage can be built between metric spatial relations and natural-language spatial relations. The proposed methods have been proven to be rational by the performances of spatial query. 相似文献
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GIS线目标间空间关系的集成表达方法 总被引:1,自引:0,他引:1
GIS中的线目标可以表达现实中一类广泛存在的空间实体,如地铁线、管线、道路以及河流等。以线目标为研究对象,基于分解与组合的思想,提出一种线/线目标空间关系的集成表达方法。在整体上,将空间关系分解为拓扑、方向和距离关系3种,并以拓扑关系描述作为方向和距离信息的载体,通过纳入局部的方向关系和距离关系,来集成表达两个线目标间的各种类型空间关系信息。其中在线目标间拓扑关系、方向关系和距离关系描述时,分别将它们分解为一组局部关系(或基本关系),并通过对拓扑关系建立一定的排列顺序来进行描述。最后,通过一个简单例子说明本文提出的方法与Clementini和Di Felice(1998)的不同。以及本文方法对表达各种空间关系信息的可行性。 相似文献
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