PPRN perimeter flooding by overflow of the Seugne and terrain movements of the commune of Pons in Charente-Maritime

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 (natural) PPR;
— scope of exposure to risks that corresponds to the perimeter regulated by the approved RPP. This approved perimeter is a public utility easement (PM1 for PPRNs);
— scope of study which corresponds to the envelope in which the hazards were studied.

本数据集收录了PPRN（PPRN）不同发展阶段的边界信息。此类边界的核心特征为：系官方行政行为的产物，且自既定日期起产生法律效力。具体包括以下三类：
— （自然）PPR（PPR）审批指令中载明的法定批复边界；
— 对应经批准的RPP（RPP）所规制边界的风险暴露范围，该经批准的边界属于公共地役权（PPRN对应的PM1）；
— 对应隐患研究覆盖范围的研究范畴。