Titlebook: Advances in Spatial Databases; 5th International Sy Michel Scholl,Agnès Voisard Conference proceedings 1997 Springer-Verlag Berlin Heidelbe

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红润

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Orthogonal polygons as bounding structures in filter-refine query processing strategies,ith a minimum bounding rectangle (an orthogonal polygon with just 4 vertices in two dimensions) as an object approximation method is presented. Orthogonal polygons can be used to improve the performance of the refine step in the filter-refine query processing strategy employed in spatial databases.

Minuet

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Geo-Opera: Workflow concepts for spatial processes,vocations and data exchanges. Due to the generality of the notion of process and the high demand for the functionality they provide, process support systems are starting to be used in a variety of application areas, from business re-engineering to experiment management. In particular, recent results

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Physical database design for raster images in concert,osed in research and development. Externalization of database functionality is a radical departure from traditional thinking. Traditionally, all data is loaded into and owned by the database, whereas in the new paradigm data may reside outside the database in external repositories or archives. Never

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Topological error correcting in GIS,data sets are coming from a lack of knowledge about topological relations between the geographical objects stored in the database. Consequently, topology can help to find errors in GIS data sets, and can help to correct them. The topic of this paper is to present how topological relation can be used