Spatial Data Infrastructures (SDI) have been implemented over the last twenty years in particular to contribute to environmental policy by improving geographical information access and sharing processes. This article focuses on French SDI and their contribution to Integrated Coastal Zone Management (ICZM), a complex form of territorial governance for which the collection and sharing of geographic information have been identified, since the 2000s, as a major component on which to found coastal and marine public policies. Based on an online survey and on statistical, structural and thematic analyses of qualitative data, the study gathers the various points of view of public users and producers of geographical information. Public bodies working for coastal zone (government service, local authority, public institution...) are specially targeted. The analyses of responses provide three types of results : the profile of the respondents, the SDIs involved in the management of French coastal zones, and their contribution to ICZM. A user’s typology of French coastal SDIs is also proposed.