关键词: 空间查询, 空间认知, 最大内径中心, 形状影响因子

Abstract: Spatial query of shape-based is closely related to the spatial reasoning of cognitive subject. From the perspective of spatial cognition, the query results that is hoped to be a collection of objects with similar shape. Aiming at the research contents of uncertainty expression of shape and fuzzy query, this paper proposes a spatial query method called Envelope（TFE） algorithm based on the shape recognition of 2D objects. In the algorithm, an object is divided into a set of triangles which contain the same point called maximum diameter center, and then a method of shape measurement is established, which can computes the shape similarity between objects through extract the shape impact factors of all vertices to the overall structure of object, and matches with shape predicates. The experiments show TFE algorithm realizes spatial fuzzy query of 2D objects and the query results consistent with the shape predicates.

Key words: spatial query, spatial cognition, maximum diameter center, shape impact factor