Évaluation d’une zone d’écoulement floue basée sur la topographie à l’aide de prédicats spatiaux 3D

Fuzzy logic can play an important role in the the modeling of geographical knowledge, in particular in crisis management. Such systems mostly rely on Geographical Information Systems that are ocused on 2D information. In this paper, we use the fuzzy morpho-mathematics framework to define new relations to reason on the topography with a digital terrain model. In particular, we focus on the characterisation of the line of greatest dip.Without loss of generality, we then illustrate those relations on a case of runoff from a building and a terrain.