Dataset Direct Download Service (WFS): Flood Risk Prevention Plan (PPRI) hazard zone of the Clain Valley department of Vienna

Area exposed to one or more hazards represented 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. 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 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.

本类数据集指代用于反应堆保护计划（RPP）风险分析的灾害地图（hazard map）上标注的、受一种或多种灾害影响的区域。
灾害地图是灾害研究的成果，其目标为评估研究区域内任意点位处各类灾害的强度。针对不同灾害类型，需采用专属评估方法，由此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。在为辖区内某一给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量级。
针对多随机PPRN场景，灾害地图上的每个分区通常会依据其所暴露的各类灾害，分别分配专属编码以完成标识。
本类数据集包含灾害地图上标注的所有灾害影响区域。设有防护结构的区域亦须进行标注（可采用专属方式），因为即便设置防护结构，该区域仍可能因结构破损或防护不足而处于灾害威胁之下。
灾害分区可被视为衍生数据，其生成过程需整合多源的计算类、建模类或观测类灾害数据。本类数据集不涵盖上述源数据，源数据的相关规范由另一项面向灾害认知的标准进行规定。
研究区域内的部分区域可被认定为"无灾害或灾害影响可忽略区域"，即经研究确认无灾害风险的区域。此类区域不纳入本类数据集范畴，亦无需作为灾害分区进行标注。但针对天然RPP场景，监管分区可能将未受灾害影响的区域划定为规定区域。