Map Viewing Service (WMS) of the dataset: Risk — IRPP hazard area in Loir-et-Cher

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 subject to hazard (case of breakage or inadequacy of the structure). Hazard zones can be described as developed data to the extent that they result from a synthesis using multiple 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).本类对象指用于RPP风险分析的危险地图（hazard map）上标注的、暴露于一种或多种危险的区域。危险地图源自危险研究，其研究目标为评估研究区域内任意点位的各类危险强度。评估方法因危险类型而异，其会在研究范围内划定若干区域，形成按危险等级分级的分区方案。针对区域内指定点位的危险等级赋值，会综合考量该危险现象的发生概率及其强度等级。针对多随机PPRNs，危险地图上的每个分区通常会通过其所暴露的各类危险对应的编码进行标识。本类对象涵盖危险地图上标注的全部危险区域。受防护结构保护的区域必须（可采用特定方式）予以标注，因为即便有防护结构，该区域仍可能面临危险风险——例如结构发生断裂或防护不足的情况。危险区域可被视为经开发整合的数据集，其源自对多源计算、建模或观测得到的危险数据的综合整合。本类对象不涵盖这些源数据，相关源数据由另一项针对危险认知的标准进行规范。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的区域。此类区域不属于本类对象范畴，无需作为危险区域进行标注。但针对天然RPP，监管分区可能会将部分未暴露于危险的区域归类为规定区域（详见PPR类的定义）。