Map Viewing Service (WMS) of the dataset: PPRN hazard zone flooding by overflow of the Charente River in the commune of Dompierre-sur-Charente in Charente-Maritime

Area exposed to one or more hazards represented on the hazard maps used for risk analysis of the RPP.
Hazard maps are the result of the study of hazards whose objective 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 allocation 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 maps by a code for each hazard to which it is exposed.

All hazard areas represented on the hazard maps 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 concerned by this class of objects but by another standard dealing with the knowledge of hazards.
Some areas within the study area are considered “no 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).

用于RPP风险分析的灾害地图中所标注的、暴露于一种或多种灾害的区域。
灾害地图源自灾害专项研究，其核心目标为评估研究区域内任意点位的各类灾害强度。不同灾害类型对应专属的评估方法，据此可在研究范围内划定一系列区域，形成按灾害等级分级的灾害区划。对区域内特定点位分配灾害等级时，需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场景，各区域通常会在灾害地图上通过其暴露的各类灾害对应的编码进行标识。

所有在灾害地图中标注的灾害区域均纳入本数据集。受防护结构保护的区域也必须予以标注（可采用专属方式），因为即便有防护结构，仍存在结构破损或防护不足而引发灾害的可能，因此此类区域始终被视为处于灾害风险中。
灾害区域可视为经过加工的数据集，其生成依赖于对多源计算、建模或观测得到的灾害数据的综合整合。此类源数据不属于本对象类的范畴，而是由另一项专门针对灾害认知的标准进行规范。
研究区域内部分区域被归类为"无灾害或灾害可忽略区域"，即经研究确认无灾害发生风险的区域。此类区域不属于本对象类范畴，无需作为灾害区域进行标注。但对于天然RPP场景，监管区划可能将部分未受灾害影响的区域划定为规定区域（详见PPR类的定义）。