International audienceAfter an overview of the issues and the regulatory environment related to the sharing and dissemination of geographical information, this article describes the experimentation conducted for the implementation of an interagency spatial data infrastructure in two regions of France (Haute et Basse-Normandie): namely the Pole Géomatique Interservices Mer et Littoral. It aims to draw some generic lessons applicable to the development of spatial data infrastructures for Integrated Coastal Zone Management. The work carried out has analyzed the organizational and functional conditions of the use of geographic information among government departments and their partners as part of their missions on the coastal zone. Based on the...