Towards the Reduction of Spatial Joins for Knowledge Discovery in Geographic Databases Using Geo-Ontologies and Spatial Integrity Constraints
نویسندگان
چکیده
Spatial join is the most expensive operation in geographic databases, but essentially important to compute spatial relationships intrinsic to geographic data. In account of spatial relationships real world entities may affect the behavior of other entities in the neighborhood. Spatial relationships are fundamental for knowledge discovery in geographic databases and are strongly related to the discovered patterns. Knowledge discovery is a user-dependent process, but the user is usually neither an expert in geographic databases nor in spatial relationships. This paper presents an approach to reduce the number of spatial relationships for knowledge discovery, using a geo-ontology and semantic spatial integrity constraints. We show how spatial constraints can help the user of knowledge discovery in both defining the semantically consistent spatial relationships and reducing the verification of unnecessary relationships.
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