It represents a common national database for the sharing of geographical data considered a priority. The priority information contained is limited to hydrography (courses and stretches of water) and traffic conditions (all main roads and railways) present on the Regional Technical Map at a scale of 1:10,000. It is a database with regional coverage created by the Interregional Center according to the data model and the Technical Specifications (N1005) of the State-Regions Agreement. Produced in shp format, starting from CTRN 10k data, it is limited to only "urgent information levels" relating to traffic and hydrography. Structural characteristics are: - hydrographic network, SiBaPo coding and coherence between information layers; - road viability, graph structure with mixed standard between GDF-1 and GDF-2 and dynamic segmentation.
