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Part of the book series: Informatik-Fachberichte ((INFORMATIK,volume 171))

Abstract

In order to handle spatial data efficiently, as required in computer aided design and geo-data applications, a database management system (DBMS) needs an access method that will help it retrieve data items quickly according to their spatial location. In this paper we give a classification of existing spatial access methods and show that they use one of the following three techniques: clipping, overlapping regions, and transformation. The performance of all previous schemes depends on and varies with the application. There is no scheme with a good overall performance. Thus our approach is to combine these techniques in one hybrid method to achieve good performance independent of the application. In an analysis we show the performance gain of our new scheme in comparison to previous proposed methods.

Zusammenfassung

Für die Organisation von geometrischen Daten, wie sie z.B in CAD-Anwendungen vorkommen, durch Datenbanksysteme (DBMS), benötigten diese Raum-Zugriffsstrukturen, die ein effizientes Suchen bezüglich der geometrischen Attribute der Daten gewährleisten. In diesem Bericht geben wir eine Übersicht von bekannten Raum-Zugriffsstrukturen. Darüberhinaus wird eine Aufteilung von Raum-Zugriffsstrukturen in drei Klassen vorgenommen, wobei jede Klasse durch eine Technik charakteriziert ist, die es erlaubt Raum Zugriffsstrukturen aus einer beliebigen mehrdimensionalen (Punkt-) Zugriffsstruktur zu generieren.

Viele dieser Raum-Zugriffsstrukturen sind zugeschnitten für spezielle Daten, wobei diese Daten gewisse Vorausetzungen erfüllen müssen, damit die Raum-Zugriffsstrukturen effizient sind, bzw. sogar anwendbar sind. Durch eine Kombination diverser Techniken, erreichen wir unserem neuen Verfahren eine flexibelere Organisation von Raumdaten ohne daß Bedingungen an diese Daten gestellt werden. Darüberhinaus zeigen wir die Leistung von unserem neuen Raum-Zugriffsstruktur, im Vergleich zu bereits exestierenden Strukturen.

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© 1988 Springer-Verlag Berlin Heidelberg

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Seeger, B., Kriegel, HP. (1988). Spatial Access Methods based on Dynamic Hashing. In: Lutterbach, H. (eds) Non-Standard Datenbanken für Anwendungen der Graphischen Datenverarbeitung. Informatik-Fachberichte, vol 171. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-73608-7_2

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  • DOI: https://doi.org/10.1007/978-3-642-73608-7_2

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-19175-9

  • Online ISBN: 978-3-642-73608-7

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