Map Viewing Service (WMS) of the dataset: PPRN hazard zone flooding by overflow of the Charente River on the commune of Chaniers 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).

本对象类涵盖用于RPP风险分析的灾害风险图（hazard map）中所标注的、受一种或多种危险源影响的区域。
灾害风险图是针对各类危险源开展研究的成果，其核心目标为评估研究区域内任意点位的各危险源强度。针对不同类型的危险源，需采用专属评估方法，最终在研究范围内划定若干区域，形成按危险源等级分级的区划方案。在指定区域点位确定危险源等级时，需综合考量危险现象的发生概率及其强度等级。
针对多随机PPRN，各区域通常会通过代码在灾害风险图上进行标识，代码对应其受影响的各危险源类型。
所有在灾害风险图中标注的危险源影响区域均需纳入本对象类。受防护结构保护的区域也必须予以标注（可采用专属标注方式），因为即便设有防护结构，该区域仍可能面临危险源威胁（例如防护结构失效或防护能力不足的场景）。
灾害风险区划可被视为经加工整合的数据集，其生成过程需整合多源计算、建模或实测得到的危险源数据。这类源数据不属于本对象类的范畴，而是由另一项专门针对危险源认知的标准进行规范。
研究区域内的部分区域被划分为"无危险或可忽略危险区域"，即经评估危险源强度为零的区域。此类区域不属于本对象类，无需作为灾害风险区划进行标注。不过，针对天然RPP，监管区划可能将未受危险源影响的区域划定为规定区域（详见PPR类的定义）。