Utilisation d’un variogramme flou dans une méthode d’agrégation sémantique Use of a fuzzy variogram in a sematic based agregation method

This work deals with spatial interpolation and problems related to the imprecision and the uncertainty of the data. Previous works led us to define a semantic-based aggregation process, which allows the combination of spatial data defined by fuzzy sets and possibility degrees. This article proposes to modify this aggregation process, in order to take into account a fuzzy variogram describing the spatial structure of the data. Therefore, it defines a method for the fuzzy dilatation of the spatial data and introduces a transformation of a probabilistic model defined by a fuzzy variance and a possibilistic model. An application of the method to theoretical data is also presented. This application allows to compare the results provided with and without taking into account the spatial structure, with different point densities.