MULTIPLE REPRESENTATION SPATIAL DATABASES AND THE CONCEPT OF VUEL Yvan Bédard, Eveline Bernier, Thierry Badard Yvan Bédard, PhD Departement of Geomatics Sciences Centre for Research in Geomatics Canada NSERC Industrial Research Chair in Geospatial Databases for Decision-Support Laval University Quebec City, Qc Canada G1K 7P4 Phone.: 418.656.2131 (3694) Fax.: 418.656.7411 yvan.bedard@scg.ulaval.ca Eveline Bernier, MSc Research Assistant Centre for Research in Geomatics Canada NSERC Industrial Research Chair in Geospatial Databases for Decision-Support Laval University Quebec City, Qc Canada G1K 7P4 Phone.: 418.656.2131 (6734) Fax.: 418.656.3607 Eveline.bernier@scg.ulaval.ca Thierry Badard, PhD Departement of Geomatics Sciences Centre for Research in Geomatics Laval University Quebec City, Qc Canada G1K 7P4 Phone.: 418.656.2131 (7116) Fax.: 418.656.7411 thierry.badard@scg.ulaval.ca