Map visualisation service (WMS) of the dataset: Plan for the prevention of natural hazards of landslides — Commune de Moissac — Perimeter — Department of Tarn-et-Garonne

This dataset contains the boundaries at the different stages of the development of the PPRN. The characteristic of such perimeters is to be the consequence of an official act and to produce their effects from a defined date. This is the following:
— prescribed perimeter contained in the prescription order of a PPR (natural or technological);
— scope of exposure to risks that corresponds to the perimeter 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.

本数据集涵盖了PPRN（PPRN）发展各阶段的边界范围。此类边界的核心特征为：由官方行为催生，并自指定日期起生效。具体包括以下三类：
——纳入PPR（PPR）处置令的法定边界（涵盖自然型与技术型PPR）；
——与获批RPP所规制的边界相对应的风险暴露范围；该获批边界为公共事业地役权（PPRN对应PM1，PPRT对应PM3）；
——与危害研究覆盖空间包络相对应的研究范围。