Perimeter of the PPRi of the Vals de Sully, Ouzouer and Dampierre

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 following: — prescribed scope contained in the prescription order of a PPR (natural or technological); — scope of risk exposure 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 which corresponds to the envelope in which the hazards were studied.本数据集收录了PPRN开发各阶段的边界信息。此类边界的核心特征为：由官方行为所创设，且自指定生效日期起产生效力。 具体如下： — 法定范围：PPR（天然型或技术型）规定令中载明的范围； — 风险暴露范围：对应经核准RPP所规制的范围，该核准边界属于公用役地（PPRN对应PM1，PPRT对应PM3）； — 研究范围：即开展灾害研究所覆盖的空间包络。