Map Viewing Service (WMS) of the dataset: Perimeter of the PNIPP of the Loir Valley 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开发全流程不同阶段的边界范围。此类边界的核心属性为：由法定行为所创设，且自指定日期起产生法律效力。具体涵盖以下三类范围：
- 由PPR规制令所载明的法定边界（涵盖自然类与技术类PPR）；
- 与获批RPP所规制范畴相对应的风险暴露范围，该获批边界属于公用地役权（PPRN对应PM1，PPRT对应PM3）；
- 对应危险评估覆盖区间的研究范围。