This presentation (slides in French) was created for the "Interfaces numériques" strand of the 9th Frankoromanistentag held in Münster, Germany (see https://www.romanistik.de/for/2202). I begin with the evolving notion of an interface in two works of Milad Doueihi and I assert the basic fact that a map has always been a kind of interface. Digital mapping is no different. I present my two corpora (a spatial dataset and a text base of medieval French) and some visualizations (faceted and comparative), some network visualizations of place and conclude with some comments on community-sourced gazetteers.