This paper describes the results of the project developed in IRPHa (Instituto Regional de Planeamiento y Hábitat, National University of San Juan, Argentina). It consists in the development of a Territorial Organization Plan for the Zonda Department in San Juan’s country, as first stage of the Strategic Development Plan of Zonda. The project uses GIS technology as support of space analysis and includes the elaboration of a Plan of Space physical Organization and a Plan of Socioeconomic Organization. This tool allows us to simulate different social, economic, space and environmental scenarios. Modifying the main variables can be observed alternative to diverse action courses or decision to be taken