Dataset Direct Download Service (WFS): PPRI Aubette (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”).本数据集指用于RPP风险分析的危险地图上标注的、受一种或多种危险影响的区域。危险地图是危险专项研究的成果，该研究的目标为评估研究区域内任意点位的各类危险强度。评估方法针对不同危险类型各有针对性，可在研究边界范围内划定若干区域，形成按危险等级分级的区划。针对研究区域内特定点位的危险等级赋值，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），危险地图上的每个区域通常会通过其受影响的各类危险对应的编码进行标识。危险地图上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也需标注（可采用特定标注方式），因为即便有防护结构，仍存在结构破损或防护不足的风险，此类区域仍被视为处于危险影响范围内。危险区域可归类为经汇总编制的数据，前提是此类数据通过整合多源计算、建模或观测得到的危险数据生成。上述源数据不属于本对象类别的覆盖范围，而是由另一项针对危险认知的标准进行规范。研究边界范围内存在部分被称为“零危险或可忽略危险区域”的点位，即经研究确认无危险影响的区域。此类区域不纳入本对象类别，也无需作为危险区域进行标注。但针对天然PPR（natural PPRs），监管区划可能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）。