Plan to Prevent the Risks of Field Movement Due to the Dissolution of the Gyspe in Paris

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）是政府开展风险防控的核心工具，其核心目标为管控风险区域内的开发活动。编制风险预防计划将生成一系列空间数据，并将其归类为多个数据集。
同一风险预防计划（PPR）可包含以下空间数据集：
• 涵盖各类边界的主风险预防计划：包含研究边界、法定管控边界、管控范围；
• 计划获批后的限制开发区域。风险预防计划的管控规则通常会区分两类区域：一是"禁建区"，即所谓"红色区域"，此类区域风险等级较高，通用规则为禁止建设；二是"合规要求管控区"，亦称"蓝色区域"，包含两类子区域：其一为风险等级中等、项目需适配问题类型落实管控要求的区域，其二为未直接暴露于风险但仍受禁令或管控约束的区域；
• 灾害风险分析专用灾害地图中标注的灾害区域：该地图通过与承灾体（stakes）开展空间叠加分析完成风险研判，并需明确每个区域所承受的灾害等级；
• 承灾体（stakes）：即受灾害威胁、可能因此遭受影响或损失的人员、财产、活动、文化或环境遗产要素；
• 风险源（origins of risk）：即其存在会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风险源的地理对象进行标识。