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.

本数据集对应用于RPP风险分析的灾害地图中标注的受洪水灾害威胁的区域。
该灾害地图为灾害研究的成果，其研究目标为评估研究区域内任意点位的各类灾害强度，由此在研究范围内划定一系列按灾害等级分级的区域分区。
在给定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。
针对多随机PPRN场景，灾害地图上的每个区域通常会通过其所暴露的各类灾害对应的代码进行标识。
灾害地图上标注的所有受灾害影响区域均需纳入本数据集。受防护结构保护的区域亦需（可采用特定方式）予以表征，因这类区域始终存在灾害风险（例如防护结构失效或防护能力不足的情形）。
灾害分区可作为经整合开发的数据予以描述，这类数据源于对多源计算、建模或观测得到的灾害数据的综合分析。此类源数据不属于本对象类别的范畴，而属于另一项涉及灾害认知的标准规范所覆盖的内容。
研究区域内的部分区域被认定为"无灾害或灾害可忽略区域"，即经研究确认灾害强度为零的区域。这类区域不属于本对象类别，也无需作为灾害分区进行表征。不过，对于天然RPP场景，监管分区可能会将部分未受灾害影响的区域划定为规定管控区域。