The research activity has been managed with the aim of testing and identifying procedures , methods and devices to use the Geographic Information System in urban and environmental field, in free and open source sphere, increasing their representative meaning. In particular this article wants to describe the stage oriented at determining the relations between data processing architecture and the architecture of the information through the experimentation led on a scientific study case. The hub of this activity was to formulate new possibleNapplication fields of DBMS technologies in GIS sphere, always in a correct and careful scientific data management and in a general prospect of a widest knowledge diffusion.