Bathymetry measurements using recreational shipping equipment providing a huge dataset from lake Ammersee in southern Germany

Large amounts of measurement data are essential for bathymetric documentation and analysis of water bodies around the globe. Even crowdsourced and amateur measurements can be helpful. Within this study we present a huge dataset collected at a German lake with a 25 ft/7.5 m sailing yacht and discuss various topics of methodology and data quality. Data visualisations are given on global and local scale. A second high-resolution dataset collected in a small region with a 3.6 ft/1.1 m software- and remote-controlled drone boat is used as reference.