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Indiscernibility and Vagueness in Spatial Information Systems
KTH, Superseded Departments, Numerical Analysis and Computer Science, NADA.
2003 (English)Doctoral thesis, monograph (Other scientific)
Abstract [en]

We investigate the use of the concept of indiscernibilityand vagueness in spatial information systems. To representindiscernibility and vagueness we use rough sets, respectivelyfuzzy sets. We introduce a theoretical model to supportapproximate queries in information systems and we show howthose queries can be used to perform uncertain classi.cations.We also explore how to assess quality of uncertainclassi.cations and ways to compare those classi.cations to eachother in order to assess accuracies. We implement the querylanguage in an SQL relational language to demonstrate thefeasibility of approximate queries and we perform an experimenton real data using uncertain classi.cations.

Place, publisher, year, edition, pages
Stockholm: Numerisk analys och datalogi , 2003. , xvi, 90 p.
Trita-NA, ISSN 0348-2952 ; 0321
Keyword [en]
indiscernibility, vagueness, rough sets, fuzzy sets, information systems
URN: urn:nbn:se:kth:diva-3634ISBN: 91-7283-602-4OAI: diva2:9466
Public defence
NR 20140805Available from: 2003-11-04 Created: 2003-11-04Bibliographically approved

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