Map Viewing Service (WMS) of the dataset: Perimetre of the PPRN of the Lower Bresle Valley

Perimetre of the PPRN of the Lower Valley of Bresle. This dataset contains the boundaries at the different stages of the development of the PPRN. The characteristic of these perimeters is to be the consequence of an official act and to produce their effects from a specified date. This is the:- prescribed perimeter set out in the Prescribing Order of a PPR (natural or technological);- scope of exposure to risks that corresponds to the scope regulated by the approved RPP. This approved perimeter is a utility easement (PM1 for PPRNs and PM3 for PPRTs);- scope of study that corresponds to the envelope in which the hazards were studied.布雷勒河下游流域PPRN的周边范围。本数据集收录了PPRN在不同发展阶段的边界范围。此类周边范围的核心特征为：均由官方法定文书确立，并自指定生效日期起正式生效。具体包括：- 由PPR（自然或技术类）划定令所列明的法定周边范围；- 与经核准的RPP所规制的风险影响范围相一致的风险暴露范围；该经核准的周边范围属于公用役地（PPRN对应PM1，PPRT对应PM3）；- 与开展危险源研究所覆盖的包络范围相一致的研究范畴。