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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KTH, Superseded Departments, Numerical Analysis and Computer Science, NADA.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.
Series
Trita-NA, ISSN 0348-2952 ; 0321
Keyword [en]
indiscernibility, vagueness, rough sets, fuzzy sets, information systems
Identifiers
URN: urn:nbn:se:kth:diva-3634ISBN: 91-7283-602-4 (print)OAI: oai:DiVA.org:kth-3634DiVA: diva2:9466
Public defence
2003-11-10
Note
NR 20140805Available from: 2003-11-04 Created: 2003-11-04Bibliographically approved

Open Access in DiVA

fulltext(768 kB)252 downloads
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be01ff9f98204be33d3a450cd3d8f406dae1c1c5244749f9d4bb25fd3b30d83416de39f3
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Numerical Analysis and Computer Science, NADA

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf