Map visualisation service (WMS) of the dataset: Plan for the prevention of natural hazards of landslides — Commune de Boudou — Zone d’Aléas — Department of Tarn-et-Garonne

Area exposed to one or more hazards shown on the hazard map used for the RPP risk analysis. The hazard map is the result of the study of hazards whose objective is to assess the intensity of each hazard at any point in the study area. The evaluation method is specific to each type of hazard. It leads to the delimitation of a set of zones on the study perimeter constituting a graduated zoning according to the level of the hazard. The award 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 works must be represented (possibly in a manner specific) because they are always considered subject to hazard (case of rupture or inadequacy of the work). Hazard zones may be described as elaborate data in so far as they result from a synthesis using several calculated hazard data sources, modelled or observed. These source data are not concerned by this class of objects but by another standard dealing with the knowledge of hazards. Some areas of the study perimeter are considered “zero or insignificant hazard areas”. These are the areas where the hazard has been studied and is zero. These areas are not included in the class of objects and do not have to be represented as hazard zones. However, in the case of natural PPRs, regulatory zoning may classify certain areas not exposed to hazard in prescribing zone (see definition of ZonePPR class).用于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。 本灾害地图源于灾害研究工作，其核心目标为评估研究区域内任意点位的各类灾害强度。不同灾害类型对应专属评估方法，据此可在研究范围内划定若干区域，形成基于灾害等级的分级分区体系。对某一特定地域点位赋予灾害等级时，需综合考量危险现象的发生概率及其强度量级。 针对多随机PPRN场景，灾害地图上的每个区域通常会依据其暴露的各类灾害，分别赋予对应专属编码以作标识。 需纳入灾害地图上标注的全部灾害影响区域。经防护工程保护的区域亦需予以呈现（可采用专属表达方式），因为即便设置防护措施，该类区域仍存在受灾害影响的风险（例如防护工程发生破损或效能不足的情形）。 灾害区域可作为精细化数据进行描述，其生成过程需整合多源计算得到的灾害数据、建模结果或实地观测数据。本对象类别不涵盖上述源数据，相关源数据由另一项针对灾害认知的标准规范进行管理。 研究范围内的部分区域可被认定为"零灾害或灾害可忽略区域"，即经研究确认灾害发生概率为零的区域。此类区域不属于本对象类别范畴，亦无需作为灾害区域进行标注。但针对自然PPR场景，监管分区可能会在规定分区中将部分未受灾害影响的区域纳入分类（详见ZonePPR类的定义）。