Map Viewing Service (WMS) of the dataset: Perimeter of the PPRNI of Ferté Bernard in Sarthe.

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.

本数据集收录了PPRN各开发阶段的边界信息。此类边界的核心特征为：其设立源于法定文书，并自指定日期起生效。具体包含以下三类边界：
- 由PPR规定令划定的指定边界（涵盖自然类或技术类PPR）；
- 与经核准的RPP所规制范围相对应的风险暴露范围，该核准边界属于公用役权（PPRN对应PM1，PPRT对应PM3）；
- 与开展危害研究所涉及的包络范围相对应的研究范围。