El HGIS del catastro urbano de Roma (Catastro Pio-Gregoriano, 1818-1824)

This contribution illustrates the methodology adopted for the construction of a historical GIS of the city of Rome in the nineteenth century, based on cadastral sources. The work integrates historical research based on archival documentation and geographical analysis and has as objective to produce new thematic information about the city. In this context, the informatization of the maps of the urban cadastre of 1819-24 and of the information contained in the cadastral registers has led to the development of an effective database management system based of the geographic location of the data, and the implementation of an analytical tool that allows the study of the physical structure and of the socioeconomic conditions of the city with a very high level of detail.