Perimeter of the PPRN flood from Lèves to Mévoisins, in Eure-et-Loir (28)

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.

本数据集涵盖了PPRN在不同发展阶段的边界。此类范围的特征为：由官方文书确立，并自指定日期起生效。具体包括以下三类：
1. 由PPR（天然或技术类）的划定令（Prescribing Order）所规定的法定范围；
2. 与经批准的RPP所规制范围相对应的风险暴露范围，该经核准的范围属于公共役权（utility easement），其中PPRN对应PM1，PPRT对应PM3；
3. 与开展危害研究所覆盖的研究包络范围相对应的研究范围。