Live from the Ötztal Alps (#3): Exploring high mountain 3D geoinformation

On the last day of fieldwork in the rotmoos valley two groups (terrestrial laser scanning (TLS) and photogrammetry) set off to the rotmoos glacier again. A second TLS dataset was aqcuired
which enables the students to perform a change detection or deformation analysis.

The electrical resistivity tomography (ERT) group futher explored the pre-Quaternary relief in the valley and measured another profile in the area of a ground moraine to verify previous measurements and to differentiate sediment types and process areas. The various marmots living in and around the study site are not only cute but the excavation material of their burrows also provide insights into the spatially varying composition of sediments along the ERT measurement profiles (see pictures below).

After fieldwork the students climbed the Schönwieskopf mountain to enjoy the beautiful view to Obergurgl and Rotmoos valley.

Every evening the acquired data are processed in the “sky-lab” in the Obergurgl University Center. The photogrammetry group, for example, performs a 3D reconstruction of glacial landforms which have been captured in the field with smartphone cameras.

Moreover, the 3DGeo team extended the multi-temporal terrestrial LiDAR dataset of the rock glacier Äußeres Hochebenkar in the last days. Additionally, the first UAV LiDAR point cloud of this rock glacier was acquired by Martin Rutzinger and Magnus Bremer from the Institute for Interdisciplinary Mountain Research (IGF) and Innsbruck University. They flew with a RiCOPTER UAV drone with a RIEGL VUX-1LR laserscanner. These datasets provide a valuable basis for further research on the rock glacier.


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