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An Introduction to Spatial Database Systems

An Introduction to Spatial Database SystemsRalf Hartmut G tingPraktische Informatik IV, FernUniversit t HagenD-58084 Hagen, We propose a definition of a Spatial Database system as a Database system that offersspatial data types in its data model and query language and supports Spatial data types in its implemen-tation, providing at least Spatial indexing and Spatial join methods. Spatial Database Systems offer theunderlying Database technology for geographic information Systems and other applications. Wesurvey data modeling, querying, data structures and algorithms, and system architecture for suchsystems.

The approach of [FraK86, EgFJ89] is based on combinatorial topology. Basic concepts are those of a simplex, and a simplicial complex. For each dimension d, a d-simplex is a minimal object in that dimension, hence a 0-simplex is a point, a 1-simplex is a line segment, a 2-simplex a triangle, a 3-simplex a tetrahedron, etc.

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