Perimeter of the Libercourt PPRN

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开发不同阶段的边界范围。此类边界的核心特征为：均由官方行为划定，且自指定日期起生效。具体如下： — 自然类或技术类PPR指令书中载明的法定范围； — 与获批RPP所规制的范围相对应的风险暴露范围； 上述获批边界属于公用设施地役权（PPRN对应PM1，PPRT对应PM3）； — 对应危险源研究覆盖范围的研究范围。