py4dgeo: Open-source scientific software for topographic change analysis in 3D/4D geographic point clouds. - Katharina Anders; Dominic Kempf; William Albert; Petr D. Andriushchenko; X. Huang; D. Hulskemper; T. Isensee; Dmitrii Kapitan; Ronald Tabernig; Hannah Weiser; Lukas Winiwarter; Vivien Zahs; et al. (SoftwareX, 2026)