Terrain changes from images acquired on opportunistic flights by SfM photogrammetry
Acquiring data to analyse change in topography is often a costly endeavour requiring either extensive, potentially risky, fieldwork and/or expensive equipment or commercial data. Bringing the cost down while keeping the precision and accuracy has been a focus in geoscience in recent years. Structure...
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Language: | English |
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National Snow and Ice Data Center
2017
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Online Access: | http://hdl.handle.net/10852/62149 http://urn.nb.no/URN:NBN:no-64742 https://doi.org/10.5194/tc-11-827-2017 |
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ftoslouniv:oai:www.duo.uio.no:10852/62149 2023-05-15T16:22:17+02:00 Terrain changes from images acquired on opportunistic flights by SfM photogrammetry Girod, Luc Maurice Ramuntcho Nuth, Christopher Kääb, Andreas Etzelmüller, Bernd Köhler, Jack C. 2017-03-31T12:00:30Z http://hdl.handle.net/10852/62149 http://urn.nb.no/URN:NBN:no-64742 https://doi.org/10.5194/tc-11-827-2017 EN eng National Snow and Ice Data Center Girod, Luc Maurice Ramuntcho (2018) Improved measurements of cryospheric processes using advanced photogrammetry. Doctoral thesis http://hdl.handle.net/10852/62195 http://hdl.handle.net/10852/62195 http://urn.nb.no/URN:NBN:no-64742 Girod, Luc Maurice Ramuntcho Nuth, Christopher Kääb, Andreas Etzelmüller, Bernd Köhler, Jack C. . Terrain changes from images acquired on opportunistic flights by SfM photogrammetry. The Cryosphere. 2017, 11(2), 827-840 http://hdl.handle.net/10852/62149 1462734 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=The Cryosphere&rft.volume=11&rft.spage=827&rft.date=2017 The Cryosphere 11 2 827 840 http://dx.doi.org/10.5194/tc-11-827-2017 URN:NBN:no-64742 Fulltext https://www.duo.uio.no/bitstream/handle/10852/62149/2/tc-11-827-2017.pdf Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/ CC-BY 1994-0416 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2017 ftoslouniv https://doi.org/10.5194/tc-11-827-2017 2020-06-21T08:51:40Z Acquiring data to analyse change in topography is often a costly endeavour requiring either extensive, potentially risky, fieldwork and/or expensive equipment or commercial data. Bringing the cost down while keeping the precision and accuracy has been a focus in geoscience in recent years. Structure from motion (SfM) photogrammetric techniques are emerging as powerful tools for surveying, with modern algorithm and large computing power allowing for the production of accurate and detailed data from low-cost, informal surveys. The high spatial and temporal resolution permits the monitoring of geomorphological features undergoing relatively rapid change, such as glaciers, moraines, or landslides. We present a method that takes 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 a consumer-grade camera and a simple code-based Global Navigation Satellite System (GNSS) receiver to a helicopter to collect data when the flight path covers an area of interest. Our method is based and builds upon Welty et al. (2013), showing the ability to link GNSS data to images without a complex physical or electronic link, even with imprecise camera clocks and irregular time lapses. 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 comparable to in situ mass balance stake measurements. The accuracy and precision of our DEMs allow detection and analysis of a number of processes in the proglacial area, including the presence of thermokarst and the evolution of water channels. Article in Journal/Newspaper glacier Svalbard The Cryosphere Thermokarst Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Endeavour ENVELOPE(162.000,162.000,-76.550,-76.550) Svalbard The Cryosphere 11 2 827 840 |
institution |
Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
description |
Acquiring data to analyse change in topography is often a costly endeavour requiring either extensive, potentially risky, fieldwork and/or expensive equipment or commercial data. Bringing the cost down while keeping the precision and accuracy has been a focus in geoscience in recent years. Structure from motion (SfM) photogrammetric techniques are emerging as powerful tools for surveying, with modern algorithm and large computing power allowing for the production of accurate and detailed data from low-cost, informal surveys. The high spatial and temporal resolution permits the monitoring of geomorphological features undergoing relatively rapid change, such as glaciers, moraines, or landslides. We present a method that takes 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 a consumer-grade camera and a simple code-based Global Navigation Satellite System (GNSS) receiver to a helicopter to collect data when the flight path covers an area of interest. Our method is based and builds upon Welty et al. (2013), showing the ability to link GNSS data to images without a complex physical or electronic link, even with imprecise camera clocks and irregular time lapses. 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 comparable to in situ mass balance stake measurements. The accuracy and precision of our DEMs allow detection and analysis of a number of processes in the proglacial area, including the presence of thermokarst and the evolution of water channels. |
format |
Article in Journal/Newspaper |
author |
Girod, Luc Maurice Ramuntcho Nuth, Christopher Kääb, Andreas Etzelmüller, Bernd Köhler, Jack C. |
spellingShingle |
Girod, Luc Maurice Ramuntcho Nuth, Christopher Kääb, Andreas Etzelmüller, Bernd Köhler, Jack C. Terrain changes from images acquired on opportunistic flights by SfM photogrammetry |
author_facet |
Girod, Luc Maurice Ramuntcho Nuth, Christopher Kääb, Andreas Etzelmüller, Bernd Köhler, Jack C. |
author_sort |
Girod, Luc Maurice Ramuntcho |
title |
Terrain changes from images acquired on opportunistic flights by SfM photogrammetry |
title_short |
Terrain changes from images acquired on opportunistic flights by SfM photogrammetry |
title_full |
Terrain changes from images acquired on opportunistic flights by SfM photogrammetry |
title_fullStr |
Terrain changes from images acquired on opportunistic flights by SfM photogrammetry |
title_full_unstemmed |
Terrain changes from images acquired on opportunistic flights by SfM photogrammetry |
title_sort |
terrain changes from images acquired on opportunistic flights by sfm photogrammetry |
publisher |
National Snow and Ice Data Center |
publishDate |
2017 |
url |
http://hdl.handle.net/10852/62149 http://urn.nb.no/URN:NBN:no-64742 https://doi.org/10.5194/tc-11-827-2017 |
long_lat |
ENVELOPE(162.000,162.000,-76.550,-76.550) |
geographic |
Endeavour Svalbard |
geographic_facet |
Endeavour Svalbard |
genre |
glacier Svalbard The Cryosphere Thermokarst |
genre_facet |
glacier Svalbard The Cryosphere Thermokarst |
op_source |
1994-0416 |
op_relation |
Girod, Luc Maurice Ramuntcho (2018) Improved measurements of cryospheric processes using advanced photogrammetry. Doctoral thesis http://hdl.handle.net/10852/62195 http://hdl.handle.net/10852/62195 http://urn.nb.no/URN:NBN:no-64742 Girod, Luc Maurice Ramuntcho Nuth, Christopher Kääb, Andreas Etzelmüller, Bernd Köhler, Jack C. . Terrain changes from images acquired on opportunistic flights by SfM photogrammetry. The Cryosphere. 2017, 11(2), 827-840 http://hdl.handle.net/10852/62149 1462734 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=The Cryosphere&rft.volume=11&rft.spage=827&rft.date=2017 The Cryosphere 11 2 827 840 http://dx.doi.org/10.5194/tc-11-827-2017 URN:NBN:no-64742 Fulltext https://www.duo.uio.no/bitstream/handle/10852/62149/2/tc-11-827-2017.pdf |
op_rights |
Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-11-827-2017 |
container_title |
The Cryosphere |
container_volume |
11 |
container_issue |
2 |
container_start_page |
827 |
op_container_end_page |
840 |
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1766010255136784384 |