In this report, we first carried out an analysis of the existing situation, which enabled us to take stock of GIS software, DBMS, the available budget, human resources and geographical data, and to analyse the needs and make proposals. We then moved on to the actual implementation phase of the GIS: "health care provision in the Libreville-Owendo health region" of Gabon. In this phase, we defined the overall architecture of the system, modelled the spatial information system, chose the tools (RDBMS, Map Server, Web Server, GIS client software, Webmapping software) and developed the Webmapping interface.