Abstract
International audience We describe a Spatial Data Infrastructure developed in an academic context combining a research laboratory and several environmental observatories. The technical solution is based on free tools that meet the interoperability standards of the OGC. It includes a metadata catalog and a geo-referenced data server, backed by a web portal with two map viewers which one (GeoCMS) supports the time dimension of the data. Indigeo currently offers open access to nearly 500 GIS data layers and metadata, and allows the visualization of data provided by fifteen generalist and thematic SDI. It also includes added value in terms of analysis of space-time data. However this platform is still under-used which means that most data come from a minority of contributors. Solutions are discussed to counteract this relatively common under-used of these socio-technical systems. MOTS-CLES : Infrastructures de Données Géographiques (IDG), développement technique, métadonnées, observatoire de recherche en environnement, usages, visualisation SAGEO'2016