Abstract (eng)
The European Alps have been shaped by strong glaciation during the last ice age. The potential occurrence of ice domes in the Alpine region during the Würm ice age is of interest for the understanding of landscape development in Austria. SEGUINOT et al. (2018) postulate a former ice-age ice dome in the Ötztaler Alps in their discussion paper of a later published article. The aim of this thesis is to find this ice dome using GIS-based mapping of selected glacial landforms – here used as synonym for computer-based interpretation of laser scan data. A high-resolution digital terrain model, its derivates, an orthophoto and a geological map served as bases for the mapping. The data processing, the interpretation and the presentation of the results were carried out using ArcMap 10.6. In the course of the mapping formerly glaciated areas and the ice flow direction were identified on the basis of the geomorphological features rock glaciers, moraines, linear glacial polish and roches moutonnées. This should help to define a boundary between glacial polished and not polished areas and to find indications for the ice-age ice dome.
However, the determination of exact boundaries has not been possible in the course of this thesis. The relevant areas are either strongly reshaped or covered with snow. Furthermore, there could not be found indications for the postulated ice dome. Nevertheless, an important result is that computer-based interpretation of laser scan data helps undoubtedly to determine thematic interesting areas expeditiously in order to enable more focused fieldwork.