Dataset Direct Download Service (WFS): Hazard zone of the natural risk prevention plan of Manigod (Haute-Savoie) — approved on 01/03/2019

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 (see definition of the PPR class).本数据集对应用于RPP风险分析的灾害分布图（hazard map）上标注的、暴露于一种或多种灾害的区域。 灾害分布图是灾害研究的成果，其研究目标为评估研究区域内任意点位的各类灾害强度。针对不同灾害类型，需采用专属的评估方法，由此在研究范围内划定一系列区域，形成按灾害等级分级的分区方案。针对区域内特定点位的灾害等级赋值时，需综合考量该危险现象的发生概率及其强度等级。 针对多随机PPRN场景，灾害分布图上的每个分区通常会通过其暴露的各类灾害对应的编码进行标识。 本数据集需涵盖灾害分布图上标注的全部灾害影响区域。即便区域设有防护结构，也必须（可采用专属方式）进行标注——因为防护结构可能发生破损或失效，此类区域仍被视为处于灾害风险之中。 灾害分区可被视为衍生数据，其生成依托对多源计算、建模或实测灾害数据的综合整合。本类对象不涉及上述源数据，相关源数据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"，即经研究确认不存在灾害风险的区域。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归类为规定区域（详见PPR类的定义）。