This study deals with the impact of the geographical information systems (GIS) in the french institutions of archaeological research. An examination of projects drawn from various contexts ; (archaeological services of regions with a measure of autonomy, national institute of preventive archaeological research (INRAP), Ministry of Cultural Heritage, University and institute of research gave us the opportunity to go deeper into the peculiarities and durability of the practices connected to GIS. This first approach is followed by the implementation and the analysis of ten experiments realized with the archaeological teams of the departmental service of archaeology of Val-d'Oise (SDAVO) and those of the UMR 7041 “Archaeologies and Sciences of ...