Map Viewing Service (WMS) of the dataset: 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风险分析的灾害地图（hazard map）上标注的、受到一种或多种灾害影响的区域。该灾害地图源于灾害专项研究，其研究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，最终会在研究范围内划定一系列区域，形成按灾害等级分级的区划。针对研究区域内特定点位的灾害等级赋值，需综合考量该危险现象的发生概率及其强度等级。对于多随机PPRN数据集，各区域通常会在灾害地图上通过其所受灾害对应的编码进行标识。本数据集涵盖灾害地图上标注的全部灾害影响区域。受防护设施保护的区域必须（可通过特定方式）予以标注，因为即便有防护设施，仍存在设施破损或防护不足的可能，此类区域始终被视为处于灾害影响范围内。灾害区域可归类为经整合后的数据，其源于对多源计算、建模或观测得到的灾害数据的综合分析。此类源数据不属于本对象类别的覆盖范围，而是由另一项针对灾害认知的标准进行规范。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。此类区域不属于本对象类别的覆盖范围，无需作为灾害区域进行标注。但对于自然RPP而言，监管区划可能会将部分未受灾害影响的区域划定为规定区域（详见PPR类别定义）。