D. Hulskemper presented his work at the ISPRS workshop O3DM on 15 and 16 December 2022 in Würzburg, Germany. For his Master thesis he is working on grouping and analyzing 4D objects by change derived from the data set collected for CoastScan in Kijkduin, using unsupervised machine learning. His results allow to interpret and compare weather conditions with different types of surface activities on the sandy beach in Kijkduin. The full contribution can be read here: Link.