Linear issue of the natural flood risk prevention plan of the Val de Decise — Nièvre (58)

Generally speaking, the stakes are people, property, activities, cultural or environmental heritage elements, threatened by a hazard and likely to be affected or damaged by it. The sensitivity of an issue to a hazard is called “vulnerability”.
This object class brings together all the issues that have been addressed in the RPP study. An issue is a dated object whose consideration depends on the purpose of the RPP and its vulnerability to the hazards studied. A PPR issue can therefore be considered (or not) depending on the type or types of hazard being addressed.
These elements form the basis of knowledge of the land cover necessary for the development of the RPP, in or near the study area, at the time of the analysis of the issues.

The data on issues represent a (figible and non-exhaustive) photograph of assets and individuals exposed to hazards at the time of the development of the risk prevention plan. This data is not updated after approval of the RPP. In practice they are no longer used: the issues are recalculated as necessary with up-to-date data sources.

概而言之，承险体指受灾害威胁、且可能因此遭受影响或损毁的人员、资产、生产活动、文化遗产与环境遗产要素。某一研究对象对灾害的敏感程度，被定义为“易损性”。
本对象类涵盖了风险预防计划（Risk Prevention Plan，RPP）研究中涉及的全部研究对象。研究对象是一类带有时效性的实体，其是否被纳入考量取决于RPP的编制目标，以及其对应所研究灾害的易损性。RPP研究对象是否被纳入分析，需根据所针对的灾害类型而定。
在开展研究对象分析阶段，上述要素构成了在研究区域及其周边区域编制RPP所需的土地覆被认知基础。
本数据集收录的研究对象数据，是风险预防计划编制阶段受灾害影响的资产与人员的有限但非穷尽快照。该数据在RPP获批后不再更新，实际应用中也不再直接复用：研究人员会根据实际需求，依托最新数据源重新计算研究对象相关参数。