Map Viewing Service (WMS) of the dataset: PPRi Regulatory Zoning Reference Profiles Vitry-le-François — Marne-Blaise Sector

During hydraulic modelling, the centennial flood hazard was determined on the area. In addition to the envelope of this hazard, the water levels over the entire sector could be determined. In order to visualise these water heights, a set of profile, known as “reference profiles”, was positioned with an altimeter deviation of about 20 cm. All of these ratings are linked to the General Level of France and are expressed in NGF meter. The by-law distinguishes for each area the construction projects to be above or below the regulatory rating. The regulatory rating is defined in the regulations as the reference rating increased by 5 cm for habitable or functional floor surfaces as well as for the use of water-resistant materials, and 30 cm for vulnerable equipment, including electrical installations. The reference rating to be used is indicated on the regulatory zoning maps, it must be searched immediately upstream of the site.在开展水力学模拟（hydraulic modelling）工作时，本区域已完成百年一遇洪水风险的研判。除该风险的包络范围外，还可测算得到整个片区的水位数据。为可视化展示这些水位高程，布设了一组名为“参考剖面（reference profiles）”的剖面，其高程偏差约为20厘米。所有上述高程值均以法国通用高程基准（General Level of France）为基准，单位为NGF米（NGF meter）。 本地方性细则针对各区域明确了需高于或低于合规高程值的建设项目类别。细则中对合规高程值作出如下定义：针对可居住或功能用房地面，以及采用防水材料的场景，合规高程值需较参考高程值提升5厘米；对于包括电气设施在内的易损设备，则需较参考高程值提升30厘米。所需采用的参考高程值已在合规区划图中标注，且需在场址紧邻上游区域查询获取。