Map Viewing Service (WMS) of the dataset: Isocote Lines of the Vienna Flood Prevention Plan (PPRI) on Châtellerault in Vienna

The isocote lines (level curves of altitudes reached by water during the centennial flooding) are a set of spatial data produced as part of the Vienna Flood Risk Prevention Plan on Châtellerault. 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.等水位线（isocote lines，即百年一遇洪水时的水位高程等值线）是为沙泰勒罗（Châtellerault）编制的维也纳洪水风险防控计划所生成的一套空间数据集。 等水位线标注于灾害风险地图中，而参考基准标高则标注于监管地图内。该参考基准标高为对应点位的等水位线高程再加20厘米。 该参考基准标高适用于部分建设开发活动。具体而言，在灾害风险地图划定的洪水影响区内任意点位，若开展建设开发项目，则该项目的标高要求需符合该参考基准标高。 可通过不同等水位线间的线性插值法，计算得到洪水影响区内任意点位的参考基准标高。