Add to ORKGAbstract: This paper describes an innovative solution for geovisualization of the de-mographic and administrative history of French municipalities, named “communes ” in French. This solution allows for the open dissemination of such data. The challenge is to provide a web interface for unskilled users in order to help them understand complex in-formation about the demographic evolution of French territories. Our approach combines interactive thematic, spatial, and temporal views. We describe our architecture, based on open-source technologies, and the organization of this imperfect geo-historical informa-tion in our spatiotemporal database. Our second contribution concerns the concept of an acquaintance graph that has been used to obtain an...