We have redone the figure 2 and added explanations on the process (see reply to comments on figure 2). Figure 8 should now be easier to read The surface drainage network line dataset was indeed based on the simplified (n=130) network following the following approach: Small segments with less than 10 nodes were automatically removed in SKUA (Paradigm/Emerson Trademark) and one iteration of smoothing was applied that further removed small irregularities without changing the overall orientation of major drainage lines.
Fault and surface drainage network mapping (tectonic geomorphology). The drainage network was extracted automatically. It is not clear if the “simplified” drainage network shown in Figure 2 was also extracted automatically. The data is summarized in Figure 8 (see also comments to Figure 8 below). It is not clear if the surface drainage network line dataset is based on the “unfiltered” or “simplified” data shown in Figure 2. Since n=130, one can assume the latter. It is however not made clear how this “simplified” network was generated, but there appear to be a substantial number of instances where the “simplification” provides apparent mismatches with the original data (see examples included in comments to Figure 2 below). The accuracy of the resulting plot can therefore be questioned. If the “simplified” network was generated automatically, I encourage the authors to do a manual QC of the results.