Dataset Direct Download Service (WFS): PPRI Presles (Area Zone)

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”).

本数据集涵盖用于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。该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的各类灾害强度。评估方法因灾害类型而异，最终将在研究范围边界内划定一系列区域，形成按灾害等级分级的区划体系。针对区域内特定点位的灾害等级赋值，需同时考量危险现象的发生概率及其强度等级。针对多随机PPRN场景，灾害地图上的每个区域通常会通过编码标识其受影响的各类灾害；灾害地图上标注的所有灾害影响区域均需纳入本数据集。受防护结构保护的区域也需以特定方式标注（必要时），因为此类区域仍存在遭受灾害影响的可能（如结构破损或防护效能不足的情况）。若灾害区域的划定基于多源计算、建模或观测得到的灾害数据综合而成，则可将其归类为已汇编数据。此类源数据不属于本对象类范畴，而归属于另一项专门针对灾害认知的标准规范。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。此类区域无需纳入本对象类，也无需作为灾害区域进行标注。但针对自然PPR场景，监管区划可能会将未受灾害影响的区域划定为规定区域（详见"ZonePPR"类的定义）。