Scope of the plan for the prevention of natural hazards of Vailly (Haute-Savoie) — approved on 16/04/1987

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在不同开发阶段的边界范围。此类边界的核心特征为：系官方行为所产生的结果，且自指定日期起生效。具体如下： — 自然或技术类PPR审批指令中载明的规定范围； — 与获批RPP所规制范围相对应的风险暴露范围。该获批边界为公用役地（PPRN对应PM1，PPRT对应PM3）； — 与危险源研究覆盖范围相一致的研究范畴。