An innovative and shared Geographic Information System, developed according to Web 2.0 standards, as informative support to the creation of new Territorial Landscape Master Plan of the Puglia Region (http://paesaggio.regione.puglia.it/), for the formation of "shared knowledge" in the process of upgrading and enhancement of the Apulian territory. The Observatory is one of the first "Web GIS Application" created in Italy on Web 2.0 standards, with opensource tools (PHP, MySql, Javascript, Ajax, etc.) and enhanced interaction with users.