Natural flood risk prevention plan — Tarn Sector Communes — Revision n°2 Montauban — Perimeter — Department of Tarn-et-Garonne

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.

本数据集包含PPRN（PPRN）不同发展阶段的边界。此类边界的核心特征为：其生成源于官方行为，且自指定生效日期起产生法律效力，具体包括以下三类：
— 包含于PPR（PPR）指令文书中的规定范围，PPR涵盖自然类与技术类两种类型；
— 与经批准的RPP（RPP）所规制范围相对应的风险暴露范围；该经批准的边界属于公用役权范畴，其中PPRN对应PM1，PPRT（PPRT）对应PM3；
— 研究范围，即危险源研究所覆盖的包络范围。