Map Viewing Service (WMS) of the dataset: Plan for the Prevention of Natural Risks of Field Movement — Regulatory Area — Commune de Montfermeil (93017)

Risk Prevention Plans (RPPs) are the key government instrument for risk prevention. Their objective is to control development in areas at risk. The development of a risk prevention plan generates a set of spatial data organised into several data sets.
The same PPR may include spatial datasets containing:
• main PPR encompassing perimeters (study perimeter, prescription perimeter, regulated scope);
• restricted areas of the plan once approved. RPP regulations generally distinguish between ‘construction ban areas’, so-called ‘red areas’, where the hazard level is high and where the general rule is the construction ban; ‘areas subject to requirements’, known as ‘blue zones’ where the hazard level is medium and projects are subject to requirements adapted to the type of issue and areas not directly exposed to risks but subject to prohibitions or prescriptions;
• hazard areas represented on the map of hazards used for risk analysis by crossing with the stakes, specifying for each zone the level of hazards to which it is exposed;
• stakes (persons, property, activities, cultural or environmental heritage elements) threatened by a hazard and likely to be affected or damaged by it;
• origins of risk, i.e. the real-world entity which, through its presence, represents a potential risk. This entity may be characterised by a name, a reference to an external object or a geographical object that locates the actual entity causing the risk.

风险预防计划（Risk Prevention Plans，RPPs）是政府开展风险预防工作的核心工具，其核心目标为对风险区域内的开发活动进行管控。编制风险预防计划过程中，会生成一套空间数据并将其划分为多个子数据集。
同一风险预防计划可包含以下几类空间数据集：
• 涵盖各类边界的主风险预防计划（含研究边界、规制边界、管控范围）；
• 计划获批后的限制管控区域。风险预防计划的管控规则通常会区分两类核心区域：其一为‘禁止建设区’，即俗称的‘红色区域’，此类区域灾害（hazard）风险等级较高，原则上严禁开展建设活动；其二为‘约束管控区’，即俗称的‘蓝色区域’，其中又包含两类子区域：一是风险等级为中等、区内项目需根据问题类型适配管控要求的区域；二是未直接暴露于灾害风险之中，但仍需遵守禁令或规制要求的区域；
• 灾害（hazard）区划图层：依托灾害分布图绘制，通过与承险体（stakes）叠加开展风险分析，需为每个区域明确其面临的灾害风险等级；
• 承险体图层：涵盖受灾害威胁、可能因灾害遭受影响或损毁的人员、财产、活动、文化或环境遗产要素等；
• 风险源（origins of risk）图层：即通过自身存在构成潜在风险的现实实体。该实体可通过名称、外部对象引用或用于定位实际致险实体的地理对象进行标识。