Per Margency (Perimeter)

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PPRN在各开发阶段的边界范围。此类边界的核心特征为：其系官方行为的产物，且自指定日期起产生法律效力。具体包含以下三类边界： - 由PPR（自然型或技术型）划定令所列明的法定边界； - 与经批准的RPP所规制的风险暴露范围相对应的范围，该经核准的边界属于公用役权（PPRN对应PM1，PPRT对应PM3）； - 与开展危险评估所依托的覆盖范围相对应的研究范围。