National audienceAfter the Environment Round Table "Grenelle de l'environnement", the environnemental management integrated a spatial nature throught notion of the ecological network. This one made of core areas and corridors and seen as an environmental management tool demands a specifi c methodological framework. Whereas concepts about ecological networks are clearly defi ned, their identifi cation and their cartography are far from being satisfactory. The aim of this paper is to provide element for a methological research about these questions.Suite au Grenelle de l'environnement, la gestion environnementale a intégré une dimension spatiale à travers la notion de trame écologique. Celle-ci composée de réservoirs de biodiversité et de cor...