 This study examined the accuracy of unmanned aerial vehicle, UAV, derived digital surface models, DSMs. It found that the accuracy increased as more ground control points, GCPs, were added, reaching a maximum accuracy of 0.25 meters vertically and 0.09 meters horizontally. Additionally, it was determined that the accuracy of the DSMs decreased as the distance from the nearest GCP increased. Furthermore, the surface texture of the glacier did not significantly affect the accuracy of the DSMs. This article was authored by Saskia Jindrox, Ruedi Bosch, and Daniel Farinati.