Dataset Direct Download Service (WFS): Hazard area of the risk prevention plan for terrain movements of the Clain Valley department of Vienna

Area exposed to one or more hazards land movements 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.

本类对象指用于RPP风险分析的灾害地图（hazard map）上标注的、暴露于一种或多种灾害性陆地运动的区域。
该灾害地图源于灾害专项研究，其核心目标为评估研究区域内任意点位的各类灾害强度。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，并依据灾害等级完成分级区划。某一地域点位的灾害等级赋值，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PPRNs，通常需在灾害地图上通过编码为每个区域标识其所暴露的灾害类型。
灾害地图上标注的所有灾害区域均需纳入本类对象范畴。受防护结构保护的区域同样需要被标注（可采用专属标注方式），因为即便设有防护结构，该区域仍被视作存在灾害风险——例如防护结构发生破损或防护能力不达标的情况。
灾害区划区域可作为衍生数据进行描述，此类数据源于对多源计算、建模或观测所得的灾害数据的综合分析。上述源数据并不属于本类对象的范畴，需由另一项针对灾害认知的标准进行规范。
研究区域内的部分区域被划分为“无灾害或灾害可忽略区域”，即经研究确认灾害风险为零的区域。此类区域不属于本类对象范畴，无需作为灾害区划区域进行标注。不过对于天然RPP而言，监管区划可能会将未受灾害影响的区域划定为管控区域。