The complexity of a territorial environment, made up by innumerable interactive elements, makes il possible to guarantee an information level adequate to the need of territorial planning only by means of computer aided methodologies. The management of territorial information is furthermore simplified by adopting a structured design of computer management systems (modular structure), which enable us to correctly manage information and to preserve the updating flexibility of the whole system. A module of a Territorial Information System can be defined as a set of equipment, hardware, software and human resources which are able to manage information deriving from certain sources. Every module must be able to work independently, but a1so to full interact with other modules by means of proper computer procedures and apposite hardware configurations. In this context, INFOR _1 can be considered a program of the module dedicated to the management, processing and analysis of data collected by a permanent forest inventory with systematic sampling.