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 "Orography" layer of the Bodies' Reference Territorial Data Bank (BDTRE), structured according to the national technical specifications (DPCM 10 November 2011), groups the topic of altimetry with the description of contour lines and elevations, the theme of bathymetry with the description of the bathymetric curves and bathymetric points (seabeds), the theme of the natural forms of the land, i.e. those auxiliary elements for reading the morphology of the territory and the theme of digital terrain models. The contents of this service are divided into the following levels corresponding to the BDTRE classes: - Altimetry - Bathymetry - Landforms - transport works (works such as artefacts but of greater complexity); - soil protection works; - hydraulic works defense and hydraulic regulation. The maps can be viewed using various software (e.g. QGis)