Simple download service (Atom) of the dataset: Natural Risk Prevention Plan (PPRN) hazard areas of Tercis-les-Bains — Landes (40)

Area exposed to one or more hazards represented on the hazard map used for risk analysis of the Risk Prevention Plan (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).本数据集对应风险预防计划（Risk Prevention Plan，RPP）风险分析所用灾害地图中所标注的、受一种或多种灾害影响的区域。该灾害地图源自灾害专项研究，其核心目标为评估研究区域内任意点位各灾害的强度等级。评估方法因灾害类型而异，最终会在研究范围内划定一系列区域，形成按灾害等级分级的区划方案。对境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，灾害地图上的每个区域通常会通过其受影响的各类灾害对应的编码进行标识。本数据集涵盖灾害地图上标注的全部灾害影响区域。防护结构覆盖的区域需（可采用特定方式）予以标注，因为即便设有防护结构，该区域仍可能因结构破损或防护不足而面临灾害风险。灾害影响区域可作为已加工数据集进行描述，其数据来源于对多源计算、建模或实地观测得到的灾害数据的综合整合。本数据集类别不涵盖这些源数据，相关源数据需遵循另一项针对灾害认知的标准规范。 研究区域内部分区域被划分为“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。此类区域不属于本数据集涵盖的对象范畴，无需作为灾害影响区域进行标注。但针对自然型风险预防计划，监管区划可能将部分未受灾害影响的区域划定为规定管控区域（详见PPR类别（PPR class）的定义）。