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Discussion papers
https://doi.org/10.5194/essd-2018-145
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/essd-2018-145
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

  10 Dec 2018

10 Dec 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Earth System Science Data (ESSD).

A high-frequency and high-resolution image time series of the Gornergletscher – Swiss Alps – derived from repeated UAV surveys

Lionel Benoit1, Aurelie Gourdon1,2, Raphaël Vallat1, Inigo Irarrazaval1, Mathieu Gravey1, Benjamin Lehmann1, Günther Prasicek1,3, Dominik Gräff4, Frederic Herman1, and Gregoire Mariethoz1 Lionel Benoit et al.
  • 1Institute of Earth Surface Dynamics (IDYST), University of Lausanne, Lausanne, Switzerland
  • 2Ecole Normale Supérieure de Lyon, Département des Sciences de la Terre, Lyon, France
  • 3Department of Geography and Geology, University of Salzburg, Salzburg, Austria
  • 4Laboratory of Hydraulics, Hydrology and Glaciology (VAW), ETH Zürich, Zürich, Switzerland

Abstract. The rapid growth of drone technology provides an efficient means to monitor the response of alpine glaciers to climate warming. Here we report a new dataset based on images collected during ten intensive UAV surveys of the Gornergletscher glacial system (Switzerland) carried out approximately every two weeks throughout the summer 2017. The final products, available at: https://doi.org/10.5281/zenodo.1487862 (Benoit et al, 2018), consist in a series of 10cm resolution ortho-images, Digital Elevation Models of the glacier surface, and Matching Maps that can be used to quantify ice surface displacements and velocities. Used on its own, this dataset allows mapping the glacier and monitoring surface velocities over the summer at a very high spatial resolution. Coupled with a classification or feature detection algorithm, it enables extracting structures such as surface drainage networks, debris or snow cover. The approach we present can be used in the future to gain insights into ice flow dynamics.

Lionel Benoit et al.
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A high-frequency and high-resolution image time series of the Gornergletscher - Swiss Alps - derived from repeated UAV surveys L. Benoit, A. Gourdon, R. Vallat, I. Irarrazaval, M. Gravey, B. Lehmann, G. Prasicek, D. Graff, F. Herman, and G. Mariethoz https://doi.org/10.5281/zenodo.1487862

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Short summary
This dataset provides a collection of 10 cm resolution orthomosaics and digital elevation models of the Gornergletscher glacial system (Switzerland). Raw data have been acquired every two weeks by intensive UAV surveys and cover the summer 2017. A careful photogrammetric processing ensures the geometrical coherence of the whole dataset.
This dataset provides a collection of 10 cm resolution orthomosaics and digital elevation models...
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