Province of Biella — Map Hydrogeological Constraint

Mosaic of areas subject to hydrogeological constraint pursuant to Royal Decree No 3267 of 30 December 1923, carried out within the framework of an agreement with the Cnos Fap, carried out through the acquisition of the limits derived from the official acts of constraint (original maps and any amendments of which the Province is aware). In some cases the boundaries of the constrained areas correspond to cadastral parcel limits or physical elements that have changed over time and are no longer identifiable by maps: these limits are referred to as ‘uncertain limits’.