The map is based on approximately 160,000 drilling profiles from the geological database of the State of Berlin by the Geological Survey Working Group of the Senate Department for the Environment, Transport and Climate Protection. The Digital Terrain Elevation Model (DGM 10), the map Expected Mean Highest Groundwater Level (EMHGL), 2016, and, for drinking water conservation areas, the map Expected Highest Groundwater Level (EHGL), 2018, were used to calculate the depth to groundwater in the glacial spillway and the Panke Valley (SenStadtUm 2016, SenStadtWohn 2017b, SenStadtWohn 2018b).
