Simple download service (Atom) 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).

本类对象指用于RPP风险分析的灾害地图（hazard map）上标注的、遭受一种或多种灾害影响的区域。
灾害地图是灾害研究的成果，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，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区划方案。
为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等级。
针对多随机PPRN（multi-random PPRNs），灾害地图上的每个区域通常会通过其所对应受影响灾害的编码进行标识。
本类包含灾害地图上标注的全部灾害区域。受防护结构保护的区域也必须予以标注（可采用专属标识），因为即便设置了防护结构，此类区域仍可能面临灾害风险（如结构破损或防护效能不足的场景）。
灾害区域可归类为经整合后的数据产物：其合成来源包括多源计算得到的灾害数据、建模数据或实测数据。本类对象不涵盖上述源数据，相关源数据应遵循另一项用于灾害认知的标准进行管理。
研究区域内部分区域被定义为“无灾害或灾害可忽略区域”，即经专项研究确认无灾害发生风险的区域。此类区域不属于本类对象范畴，无需作为灾害区域进行标注。但针对天然RPP（natural RPPs），监管区划可能将部分未受灾害影响的区域归类为规定性区域（详见PPR类（Class PPR）的定义）。