Simple download service (Atom) of the dataset: R111.3-1989 (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.本数据集收录了公共保护区域网络（PPRN）发展各阶段的边界信息。此类边界的本质属性为：系法定行政行为所创设，且自指定生效日期起生效。具体涵盖以下三类边界范畴： 1. 由公共保护区域（PPR，自然型与技术型两类）的划定令（Prescribing Order）所载明的法定边界； 2. 与经核准的风险保护区域（RPP）规制范围相对应的风险暴露范围；该经核准的边界属于公共事业地役权（utility easement），其中公共保护区域网络（PPRN）对应PM1，公共保护技术区域（PPRT）对应PM3； 3. 对应危险性研究包络范围的研究范畴，即开展危险性评估的覆盖区域。