The SoDUCo project proposes to develop methods and models to study the evolution of the urban spatial structure in relation with social and professional practices of the population. We will develop our study on the reconstitution of the evolution of Paris from 1789 to 1950 using two specific sets of sources: eight master maps of the city and its suburbs, which describe the evolution of road networks and urban fabric and, for the same time period, the directories, which give the professional activities and/or the social status of the population localized by their addresses. As a proof of concept, we constructed such databases from maps on a shorter time lap which demonstrated their importance for a better understanding of the dynamics of urban societies. Here, we propose a qualitative step forward by constructing large geohistorical databases not limited to maps but from various historical sources thanks to the digitization of these sources and to the proposed collaborative approach.