GIS, cartografa storica e archeologia dei paesaggi. Sperimentazioni sul territorio altolaziale

This paper summarizes the activities of a work aimed at georeferencing and digitizing, in the GIS environment, maps of the nineteenth-century cadastral documentation of the Papal State referable to the Viterbo area. The work was part of a larger project led by the Department of Ancient World Sciences of the University of Tuscia, which it collects the archaeological research carried out on the urban and suburban area of the ancient city of Ferento between 2009 and 2013. Such project has been extended later to the other rest of the Tiber river valley of the Provincia of Viterbo side, including the territory of Celleno. The use of GIS technology has allowed the digital transformation of the old paper maps in a series of thematic layers able to highlight different aspects of this territory in the first half of the nineteenth century, when these maps were worked out. This allowed an accurate comparison between the modern landscape and the previous landscape of in this territory.