Dataset Direct Download Service (WFS): Flood risk prevention plan (PPRI) zone of Vienna — municipality of Châtellerault in Vienna

Area exposed to flood hazard shown 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. 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 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 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.本类对象指用于RPP风险分析的灾害地图中所标注的受洪水灾害威胁的区域。 灾害地图源自灾害专项研究，该研究的目标为评估研究区域内任意点位的各类灾害强度。据此可在研究范围内划定若干区域，形成按灾害等级分级的分区方案。在研究区域内任意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。 对于多随机PPRNs而言，灾害地图上的每个区域通常会通过其暴露于的各类灾害对应的编码进行标识。 灾害地图上标注的所有灾害影响区域均需纳入本类对象范畴。由防护结构保护的区域也必须被表征（可采用特定方式），因为即便有防护结构，仍存在结构失效或防护不足的灾害风险。 灾害分区可被视为经开发的数据集，其源自对多源计算、建模或观测得到的灾害数据的综合处理。本类对象不涉及这些源数据，相关源数据由另一项专注于灾害认知的标准规范所覆盖。 研究区域内部分区域被划分为“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。此类区域不属于本类对象范畴，无需作为灾害影响区域进行表征。但对于天然RPP而言，监管分区可能将部分未受灾害影响的区域划定为规定区域。