Simple download service (Atom) of the dataset: DDT 91 — Natural hazard prevention plans (PPRN) in the Essonne department (91).

Risk Prevention Plans (RPPs) are the key government instrument for risk prevention. Their objective is to monitor development in areas exposed to a major risk. These plans regulate land use or land use through building prohibitions or requirements on existing or future buildings (constructive provisions, vulnerability reduction work, restrictions on agricultural use or practices, etc.). This geographical table allows to map existing PPRNs on the department. Each PPR is identified by a polygon that corresponds to: — within the scope of prescription when it is in the prescribed state, — the envelope of restricted zones when it is in the approved state. Each PPRN existing in the N_DOCUMENT_PPRN geographical table is linked with its GASPAR code in the format “ddd[PREF|DDT|DDTM|DREAL]aaaannnn” (AAAA and NNNN correspond to the reference year and the order number of the associated PPR procedure in GASPAR).