Web-enabled spatial decision analysis using Ordered Weighted Averaging (OWA) |
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Authors: | Claus Rinner Jacek Malczewski |
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Institution: | (1) Institute for Geoinformatics (IfGI), University of Münster, Robert-Koch-Str. 26-28, 48149 Münster, Germany (e-mail: rinner@ifgi.uni-muenster.de), DE;(2) Department of Geography, University of Western Ontario, London, Ontario N6A 5C2, Canada (e-mail: jmalczew@uwo.ca), CA |
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Abstract: | This paper presents a spatial decision support tool that implements the Ordered Weighted Averaging (OWA) method. OWA is a
family of multicriteria evaluation operators characterised by two sets of weights: criterion importance weights and order
weights. We propose a highly interactive way of choosing, modifying, and fine-tuning the decision strategy defined by the
order weights. This exploratory approach to OWA is supported by a graphical representation of the operator's behaviour in
terms of decision risk and tradeoff/dispersion between criteria. Our prototype implementation is based on the CommonGIS software,
and thus, Web-enabled and working with vector data. We successfully demonstrate online, exploratory support of spatial decision
strategies using a data set of skiing resorts in Wallis, Switzerland.
Received: 24 September 2002 / Accepted: 10 January 2003 |
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Keywords: | : Web-enabled spatial decision analysis multicriteria evaluation Ordered Weighted Averaging (OWA) Geographic Information Systems |
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