This presentation was given by Ghislaine Alleaume (AMU-CNRS, IREMAM-UMR 7310) during the workshop organized in the framework of the Cost Action IS0904 "European Architecture Beyond Europe" (INHA, Paris, France, 27-28th January 2014). Programme : http://www.architecturebeyond.eu/workshop-gis-data-visualisation-and-open-community-paris-27-28-january-2014/