Map Viewing Service (WMS) of the dataset: Prevention plan for the risk of differential terrain movements following drought and soil rehydration in the Val-de-Marne department — restricted area

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.风险防控计划（Risk Prevention Plans, RPPs）是政府开展风险防控的核心工具，其目标为管控风险区域内的开发活动。编制风险防控计划可生成一系列空间数据，并将其划分为多个数据集。 单份风险防控计划可包含以下空间数据集： • 包含各类边界的主风险防控计划：涵盖研究边界、法定编制边界、管控范围； • 计划获批后的限制开发区域。风险防控计划的管控规则通常将区域划分为两类：其一为“红色区域”，即“禁建区”，此类区域风险等级较高，通用管控规则为禁止建设；其二为“蓝色区域”，即“需合规管控区”，涵盖风险等级中等、开发项目需适配问题类型制定管控要求的区域，以及未直接暴露于风险但仍受禁令或管控要求约束的区域； • 用于风险分析的灾害风险分布图（hazard map）上标注的风险区域：需与承险体（stakes）进行空间叠加分析，并明确各区域所面临的风险等级； • 受灾害威胁、可能因灾害发生而遭受影响或损失的承险体：包括人员、财产、生产活动、文化或自然遗产要素等； • 风险源：即现实世界中因自身存在而构成潜在风险的实体。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。