Résumé
Marine spatial planning is becoming established on a global scale in a context of rapid change. It was first introduced as a national strategy before being used as a basis for producing regional MSP documents with a strong strategic quality and ultimately, enabling the coordination of tools and efforts at a local level. Based on this logic, we present three experiments which enable us to approach the contribution of geoprospective: one case combines one use and regional scale, another links multiple uses and regional scale, and the third focuses on multiple uses and local scale. We conclude that a broad approach to geoprospective should be taken, enabling it to adapt to the different application contexts and targets. The various forms of spatial representation and the different modelling techniques must be inscribed in these contexts and carefully introduced to ensure that they facilitate rather than hinder an often-fragile collaborative process.