Map Viewing Service (WMS) of the dataset: Plan to prevent the natural risks of landslides — Municipality of Piquecos — 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).

本数据集的对象为用于RPP风险分析的灾害图（hazard map）上标注的、受一种或多种灾害影响的区域。
灾害图是灾害专项研究的成果，该研究的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，其最终成果是在研究范围内划定一系列区域，形成按灾害等级分级的分区。为境内指定点位确定灾害等级时，需综合考量危险现象的发生概率及其强度等级。
对于多随机PPRN（multi-random PPRNs），灾害图上的每个分区通常会通过其所受灾害对应的专属编码进行标识。
灾害图上标注的所有灾害影响区域均需纳入本类范畴。受防护结构保护的区域也必须予以标注（可采用专属标识），因为即便设有防护结构，该区域仍可能遭受灾害影响（如防护结构失效或防护能力不足的情况）。
灾害影响区域可被视为经整合后的数据产物，其整合依据为多源计算所得、建模生成或实地观测得到的灾害数据。本类对象不涵盖上述源数据，源数据归属于另一项关于灾害认知的标准范畴。
研究区域内的部分区域被划为“无灾害或灾害可忽略区域”，即经专项研究确认无灾害影响的区域。此类区域不纳入本类范畴，也无需作为灾害影响区域进行标注。
不过，针对天然RPP（natural RPPs），监管分区可能会将部分未受灾害影响的区域划归为规定性分区（详见PPR类别的定义）。