Map Viewing Service (WMS) of the dataset: 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.

本数据集为用于RPP风险分析的灾害地图（hazard map）上标注的洪水灾害（flood hazard）暴露区域。
灾害地图是灾害研究的成果，其核心目标为评估研究区域内任意点位的各类灾害强度。该地图将研究范围划分为若干区域，形成按灾害等级分级的区划体系；在为某一地域点位分配灾害等级时，需综合考量危险现象的发生概率及其强度等级。
对于多随机PPRN而言，灾害地图上的每个区域通常会通过其暴露的各类灾害对应的专属编码进行标识。
本数据集包含灾害地图上标注的全部灾害区域。受防护结构保护的区域也必须予以标注（可采用特定方式），因为即便设置了防护结构，该区域仍存在灾害风险（如结构破损或防护能力不足的情况）。
灾害区域可视为衍生数据集，其源于对多源计算、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类对象的范畴，而是由另一项针对灾害认知的标准进行规范。
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风险的区域。此类区域不属于本类对象范畴，无需作为灾害区域进行标注。但对于自然类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管控区域。