Dataset Direct Download Service (WFS): Median Vienna Flood Prevention Plan (PPRI) isocote lines, Chauvigny — Cenon-sur-Vienne section

The isocote lines (level curves of elevations reached by water during the centennial flooding) are a set of spatial data produced as part of the Mid Vienna Flood Risk Prevention Plan. Isocotes are reported on hazard maps and reference odds on regulatory maps. The reference rating is the isocote plus 20 cm. This reference rating is applied during certain developments. That is, at any point in the flooding zone defined on the hazard map, when a development is carried out, the rating for the development is the reference rating. This can be calculated at any point in the flood zone, by linear interpolation between the different isocote lines.等水位高程线（isocote lines），即百年一遇洪水时所达到的水位高程的等高线，是维也纳中部洪水风险防治计划所生成的一套空间数据集。 等水位高程线会标注于洪水灾害地图中，同时在管制地图上标注参考基准值。该参考基准值为等水位高程值加20厘米，且会在部分开发建设活动中应用。具体而言，在洪水灾害地图划定的淹没区内任意一点，若开展开发建设，则该建设项目的标高需遵循该参考基准值。该基准值可通过淹没区内不同等水位高程线之间的线性插值，在淹没区内任意点位计算得出。