This paper introduces the setting up of a Geographical Information System on Delhi for studies in the Social Sciences. Through an explanation of their methodological procedure and demonstration of thematic applications focusing on the healthcare system's spatial organization, the authors lead us through the inherent difficulties of building a GIS in an emerging country like India. They also attempt to demonstrate that this kind of tool remains, however, a relevant support for research in the Social Sciences as long as it is used with care and knowledge of the dataset frame. From this perspective, Exploratory Data Analysis coupled with the play of scales provide powerful ways to assess socio-spatial dynamics taking place in the Indian capital.