Map Viewing Service (WMS) of the dataset: Hazard zone of the PPRT of Calaire Chemistry SA

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 assignment 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 PPRTs the hazard levels are determined by effect effect on maps by type of effect and overall on an aggregated level on a synthesis map.All hazard areas represented on the hazard map are included. Areas protected by protective structures must be represented (possibly in a specific way) as they are always considered to be subject to hazard (cases of breakage or inadequacy of the structure).The hazard zones may be classified as data compiled in so far as they result from a synthesis using several sources of calculated, modelled or observed hazard data. These source data are not covered 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 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.

本类对象指用于RPP风险分析的灾害分布图（hazard map）上所标注的、受一种或多种灾害影响的区域。该灾害分布图为灾害研究的成果，其研究目标为评估研究区内任意点位的各类灾害强度。评估方法因灾害类型而异，其会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。针对区域内某一给定点位的灾害等级赋值，需综合考量该危险现象的发生概率及其强度等级。
针对PPRT，灾害等级依据其影响效应确定：按影响类型分别绘制专项图件，并在综合图上呈现汇总后的整体等级。灾害分布图上标注的所有灾害区域均需纳入本类对象。受防护设施保护的区域也必须标注（可采用特定方式），因为即便有防护设施，仍存在设施破损或防护能力不足的可能，此类区域仍被视为处于灾害影响范围内。
若灾害分区由多源计算、建模或观测得到的灾害数据综合生成，则可对该类分区数据进行分类。本类对象不涵盖这些源数据，相关源数据需遵循其他用于灾害认知的标准规范。
研究范围内部分区域被划为"零灾害或微灾害区域"，即经研究确认无灾害风险的区域。此类区域不纳入本类对象，也无需作为灾害分区进行标注。