Plan to prevent the natural risks of landslide — Commune d’Auvillar — Zone d’alas — Department of Tarn-et-Garonne.

Area exposed to one or more hazards represented on the hazard map used for risk analysis of the RPP.
The hazard map is the result of the study of hazards, the objective of which is to assess the intensity of each hazard at any point in the study area. The evaluation method is

specific to each type of hazard. It leads to the delimitation of a set of areas on the study perimeter constituting a zoning graduated according to the level of the hazard. Award

from a hazard level to a given point in the territory takes into account the probability of occurrence of the dangerous phenomenon and its degree of intensity.
For multi-random PPRNs, each zone is usually identified on the hazard map by a code for each hazard to which it is exposed.

All hazard areas shown on the hazard map are included. Areas protected by protective structures must be represented (possibly

specific) because they are always considered to be subject to hazard (case of breakage or inadequacy of the work).
Hazard zones may be described as data compiled to the extent that they result from a synthesis using multiple calculated hazard data sources,

modelled or observed. These source data are not concerned by this class of objects but by another standard dealing with the knowledge of hazards.
Some areas within the study area are considered “no or insignificant hazard zones”. These are the areas where the hazard has been studied and is nil. These areas are not

included in the object class and do not have to be represented as hazard zones. However, in the case of natural RPPs, regulatory zoning may classify certain

areas not exposed to hazard in a prescribing zone (see definition of Class PPR).

本数据集对应用于RPP风险分析的灾害地图中所标注的、遭受一种或多种灾害影响的区域。
灾害地图源自灾害专题研究，其目标为评估研究区域内任意点位的各类灾害强度。评估方法因灾害类型而异，最终会在研究范围内划定一系列区域，形成按灾害等级分级的灾害区划。为研究区域内指定点位赋予灾害等级时，需综合考量该危险现象的发生概率及其强度程度。
针对多随机PPRN，灾害地图上的每个区域通常会通过其暴露的各类灾害对应的专属编码进行标识。
本数据集涵盖灾害地图上标注的全部灾害影响区域。设有防护结构的区域亦需被纳入（可采用专属标识），因为即便配备防护设施，此类区域仍可能因结构破损或功能失效而面临灾害威胁。
灾害区域可被视为经整合后的数据：其源自对多源计算所得、建模生成或实地观测的灾害数据的综合分析。此类源数据不属于本类对象的范畴，而归属于另一项聚焦灾害认知的标准规范。
研究区域内部分区域被归类为"无灾害或灾害可忽略区域"，即经专题研究确认无灾害影响的区域。此类区域不属于本类对象范畴，亦无需作为灾害区域进行标注。
但对于天然RPP，监管区划可能将部分未受灾害影响的区域划归为规定管控区（详见PPR类别的定义）。