The initial thickness of a sedimentary layer was determined for the Jurassic and Triassic strata by own estimations from the missing thicknesses in the area of the salt domes and from calibrated 1D models. In addition, a comparison was made with literature data from Doornebal et al. 2010 (SPBA), DGMK 2010, Maystrenko 2013. The initial thickness maps for the Carboniferous Stefan and Westfal horizons were taken from Krull (2005). For this purpose, the printed maps were converted into a contiguous surface by scanning, georeferencing, digitizing the isolines, and interpolation. The maps are available for download in two different data formats (CPS3 and Zmap). The individual thickness maps have a file size of 8.5 MB each (zip files 0.3 to 1.4 MB). The initial thickness maps were produced for the Carboniferous, Triassic and Jurassic sedimentary units. These maps form the basis for the erosion maps of the input model.