Journal cover Journal topic
The Cryosphere An interactive open-access journal of the European Geosciences Union
doi:10.5194/tc-2016-228
© Author(s) 2016. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
31 Oct 2016
Review status
A revision of this discussion paper is under review for the journal The Cryosphere (TC).
Terrain changes from images acquired on opportunistic flights by SFM photogrammetry
Luc Girod1, Christopher Nuth1, Andreas Kääb1, Bernd Etzelmüller1, and Jack Kohler2 1Department of Geosciences, University of Oslo, Postboks 1047 Blindern, 0316 Oslo, Norway
2Norwegian Polar Institute, Framsenteret, Hjalmar Johansens gate 14, 9296 Tromsø
Abstract. Structure from motion (SfM) photogrammetric techniques are emerging as powerful tools for surveying, at very high spatial and temporal resolution, geomorphological objects undergoing relatively rapid change, such as glaciers, moraines, or landslides. Modern software and computing power allows production of accurate data from low-cost surveys, compared to traditional photogrammetry conducted from dedicated fixed-wing aircraft missions. We present a method to take advantage of light-transport flights conducting other missions to opportunistically collect imagery for geomorphological analysis. We test and validate an approach in which we attach simple cameras and GNSS receivers to a helicopter to collect data when the flight path covers an area of interest. The novelty in our method is the ability to link GNSS data to images without a physical or electronic link. As a proof of concept, we conducted two test surveys in September 2014 and 2015 over the glacier Midtre Lovénbreen and its forefield, in northwestern Svalbard. We were able to derive elevation change estimates complementing in-situ mass balance measurements using the glaciological method. Furthermore, we detect and analyze a number of processes in the proglacial area, including thermokarst and the evolution of water channels.

Citation: Girod, L., Nuth, C., Kääb, A., Etzelmüller, B., and Kohler, J.: Terrain changes from images acquired on opportunistic flights by SFM photogrammetry, The Cryosphere Discuss., doi:10.5194/tc-2016-228, in review, 2016.
Luc Girod et al.
Luc Girod et al.
Luc Girod et al.

Viewed

Total article views: 254 (including HTML, PDF, and XML)

HTML PDF XML Total BibTeX EndNote
158 80 16 254 9 15

Views and downloads (calculated since 31 Oct 2016)

Cumulative views and downloads (calculated since 31 Oct 2016)

Viewed (geographical distribution)

Total article views: 254 (including HTML, PDF, and XML)

Thereof 254 with geography defined and 0 with unknown origin.

Country # Views %
  • 1

Saved

Discussed

Latest update: 22 Feb 2017
Publications Copernicus
Download
Short summary
While gathering data on a changing environment is often a costly and complicated endeavour, it is also the backbone of all research. What if one could measure elevation change by just strapping a camera and a hiking GPS under an helicopter or a small airplane used for transportation and gather data on the ground bellow the flight path? In this article, we present a way to do exactly that, and show an example survey where it helped compute the volume of ice lost by a glacier in Svalbard.
While gathering data on a changing environment is often a costly and complicated endeavour, it...
Share