This article starts by delineating the relationship between the emerging field of geoprospective and the disciplinary fields with which it is associated (prospective approaches spatial simulation methods and participatory approaches to territorial projects). The aim is to elucidate its boundaries and to explore its more original aspects using studies presented in the MAGIS seminar organized on this theme in 2011. A comparative approach highlights the diversity of geoprospective applications by highlighting their specificities (detailed spatialization of on-going processes and the integration of stakeholders in the different phases), and its possibilities for future development.