Mapping the spatial distribution of detached boulders with the use of ultra-high resolution remote sensing data and simulation of rockfall events. The case of Kalymnos Island - Vassilakis, E; Konsolaki, A.; Laskari, S; Lialiaris, I.; Soukis, K.; Kotsi, E.; Lekkas, E. (16th International Congress of the Geological Society of Greece, 2022)