A WMS (Web Map Service) is a service that produces maps of spatially referenced data starting from geographic information, and is a technical specification defined by the OGC (Open Geospatial Consortium). This WMS presents the "Areas of pertinence" layer of the Bodies' Reference Territorial Database (BDTRE), structured according to the national technical specifications (DPCM November 10, 2011), exposes the vast areas within which objects of different nature often exist and who belong to different strata and different classes. In this theme, therefore, the perimeter areas of these complex objects are classified. The contents of this service are divided into the following levels corresponding to the BDTRE classes: - Transport services - Outbuildings - Quarries - landfills The maps can be viewed using various software (e.g. QGis)