Database di Sintesi Nazionale (National Synthesis Database)

In order to realize the DBSN, with the aim of processing increasingly complete and up-to-date data, regional geotopographic data were mainly used as the primary source of information. At the early stage of the project, the latest updated data were collected and their structure was transformed to make them homogeneous at the national level, while maintaining the original level of detail. Subsequently, data were integrated with data from national public bodies, e.g., cadastral maps from the Internal Revenue Agency, data from Istat, data from other ministries, also considering other information available on the web such as Open Street Map (OSM) data. Where derived information was lacking, data were acquired directly from orthoimages. Specifically in reworking the content, the road system was updated at least for major links; administrative boundaries were derived from cadastral boundaries and a process to match municipal areas with each other and with the state boundaries was carried out; the built-up area were classified according to main use categories. Moreover, for toponymy, an updating and normalization activity has been initiated and is still ongoing. The DBSN is continuously updated by acquiring and integrating new data all the time.