Dataset Direct Download Service (WFS): PPRI Epte (Area area)

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 hazard type. 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. The assignment of a hazard level at 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 in a specific way) as they are always considered to be subject to hazard (cases of breakage or inadequacy of the structure).The hazard zones may be classified as data compiled in so far as they result from a synthesis using several sources of calculated, modelled or observed hazard data. These source data are not covered by this class of objects but by another standard dealing with the knowledge of hazards.Some areas of the study perimeter are considered “zero 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 PPRs, regulatory zoning may classify certain areas not exposed to hazard as a prescribing area (see the definition of the class “ZonePPR”).

本类对象指用于RPP风险分析的灾害地图上标注的、受一种或多种灾害影响的区域。灾害地图为灾害研究的成果，其核心目标为评估研究区域内任意点位上各类灾害的强度。各类灾害的评估方法具有针对性，据此可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。针对区域内特定点位的灾害等级赋值时，需同时考虑该危险现象的发生概率及其强度等级。
对于多随机PPRNs，灾害地图上通常会为每个受影响的灾害类型分配专属代码以标识各区域。本类包含灾害地图上标注的全部灾害影响区域。防护结构保护的区域仍需（可采用特定方式）标注为灾害影响区域，因为此类区域仍存在防护结构破损或失效而受灾害影响的可能。
灾害区域可归类为经汇编的数据，前提是其由多源计算、建模或观测所得的灾害数据综合生成。此类原始数据不属于本对象类范畴，而是归属于另一项灾害认知相关标准。
研究范围内部分区域被视为"零灾害或微灾害区域"，即经研究确认无灾害影响的区域。此类区域不属于本对象类范畴，无需作为灾害影响区域进行标注。但对于天然PPRs，监管区划可能将部分未受灾害影响的区域划定为规定管控区域（详见"ZonePPR"类的定义）。