Simple download service (Atom) of the dataset: PPRI Seine (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”).本数据集包含用于RPP风险分析的危险地图（hazard map）中所标注的、受一种或多种危险影响的区域。该危险地图为危险专项研究的成果，其研究目标为评估研究区域内任意点位各危险的强度。针对不同危险类型，需采用专属评估方法，以此在研究范围内划定一系列区域，形成按危险等级分级的分区方案。研究区域内指定点位的危险等级赋值，需综合考量该危险现象的发生概率与强度等级。针对多随机PPRN场景，危险地图上的每个分区通常会通过其暴露的各类危险对应的编码进行标识。危险地图中标注的所有危险区域均纳入本数据集范畴。受防护结构保护的区域亦需标注（可采用专属方式），因即便设置有防护结构，该区域仍存在受危险影响的可能（如结构破损或防护不足的情况）。危险分区可归类为经整合后的数据，此类数据由多源的计算、建模或观测所得的危险数据综合生成。本对象类不涵盖这些源数据，相关源数据需遵循另一项针对危险认知的标准进行处理。研究范围内的部分区域被视为“零危险或可忽略危险区域”，即经研究确认无危险存在的区域。此类区域不属于本对象类范畴，亦无需作为危险分区进行标注。但针对天然PPR场景，监管分区可将未受危险影响的部分区域归类为规定区域（详见"ZonePPR"类的定义）。