Dataset Direct Download Service (WFS): PPRN Hazard Areas — Northern Department

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 RPPs, regulatory zoning may classify certain areas not exposed to hazard as prescribing areas (see definition of the PPR class).

本数据集涵盖用于RPP风险分析的灾害危险性地图（hazard map）上标注的、受一种或多种危险影响的区域。该灾害危险性地图（hazard map）是危险源研究的成果，其研究目标为评估研究区域内任意点位的各类危险源强度。针对不同危险类型，评估方法各不相同，据此可对研究区域边界内的多个区域完成划定，形成按危险等级分级的分区方案。对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（PPRNs）场景，该灾害危险性地图（hazard map）上的每个分区通常会通过其所受危险对应的专属代码进行标识。本数据集包含该灾害危险性地图（hazard map）上标注的全部危险区域。受防护结构保护的区域必须（可通过特定方式）予以标注，即便设有防护结构，该区域仍可能因结构破损或防护不足而处于危险影响范围内。灾害危险区域可归类为经汇总的数据，前提是此类数据由多源计算、建模或观测得到的危险数据综合生成。此类源数据不属于本对象类范畴，而是由另一项针对危险认知的标准所覆盖。研究区域边界内的部分区域被归类为“零危险区或微危险区”。此类区域已完成危险评估且危险程度为零，因此不属于本对象类范畴，亦无需作为危险区域进行标注。但针对天然RPP场景，监管分区可能将未受危险影响的部分区域划定为规定区域（详见PPR类（PPR class）定义）。