The number and the size of spatial databases, e.g. for geomarketing, traffic control or environmental studies, are rapidly growing which results in an increasing need for spatial data mining. In this paper, we present new algorithms for spatial characterization and spatial trend analysis. For spatial characterization it is important that class membership of a database object is not only determi...

A central problem in modern database design is how to resolve spatial operations with normal database operations in an extended relational database environment. A data architecture that matches the requirements for efficient processing of spatial queries in the extended database environment is proposed. It provides an equal opportunity for both the spatial components and the non-spatial compone...

The Geographic Information System (GIS) uses the spatial database for its data storing purposes. As the spatial database takes huge space, the size and data retrieval cost of database increases. That’s why we have to use some optimized technique to retrieve the data from the database. Also, we can apply the distributed database concept to the spatial database to achieve better performance. Afte...

Classical database management can be flawed if the Knowledge database is built within a complex Knowledge Domain. We must then deal with inconsistencies and, in general, with anomalies of several types. In this paper we study computational and cognitive problems in dealing qualitative spatial databases.

Generalization of spatial databases consists of complicated operations including not only geometric transformations but also topological changes. The changes often result in an inconsistency between the original and derived databases. In order to control the quality of derived databases, we must assess the topological consistency. In this paper, we propose a set of rules to assess topological c...

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In this paper a visual approach to querying in large spatial databases is presented. A diagrammatic technique utilising a data flow metaphor is used to express different kinds of spatial and non-spatial constraints. Basic filters are designed to represent the various types of queries in such systems. Icons of different types of spatial relations are used to denote the filters. Different granula...