Simple download service (Atom) of the dataset: Plan to prevent the natural risks of landslides — Municipality of Montesquieu — 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).本类对象指用于风险防护计划（RPP）风险分析的灾害地图（hazard map）上标注的、受一种或多种灾害影响的区域。 灾害地图源于灾害研究，该研究的目标是评估研究区域内任意点位的各类灾害强度，且评估方法因灾害类型而异。 由此可在研究范围内划定若干区域，形成按灾害等级分级的分区方案。将灾害等级赋予辖区内特定点位的赋值过程，需综合考虑危险现象的发生概率及其强度等级。 对于多随机PPRN而言，灾害地图上的每个分区通常会通过其受影响的各类灾害对应的编码进行标识。 本类对象包含灾害地图上标注的全部灾害影响区域。受防护结构保护的区域亦需纳入标注（可采用专属标识），因为即便设有防护结构，此类区域仍可能面临灾害风险（例如防护设施失效或防护能力不足的情形）。 灾害分区可被视为整合多源计算、建模或观测得到的灾害数据后形成的综合数据集。本类对象不涉及上述源数据，相关源数据由另一项针对灾害认知的标准规范进行管理。 研究区域内的部分区域被划为"无灾害或灾害可忽略区域"，即经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，无需作为灾害分区进行标注。 但对于天然RPP而言，监管分区可能将部分未受灾害影响的区域划入规定性分区（详见PPR类别的定义）。