Using structure-from-motion to create glacier DEMs and orthoimagery from historical terrestrial and oblique aerial imagery
Increased resolution and availability of remote sensing products, and advancements in small-scale aerial drone systems, allows observations of glacial changes at unprecedented levels of detail. Software developments, such as Structure from Motion (SfM), now allow users an easy and efficient method t...
Published in: | Earth Surface Processes and Landforms |
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Main Authors: | , , , , |
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Language: | English |
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2017
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Online Access: | https://risweb.st-andrews.ac.uk/portal/en/researchoutput/using-structurefrommotion-to-create-glacier-dems-and-orthoimagery-from-historical-terrestrial-and-oblique-aerial-imagery(70b26d90-f0f6-418a-b887-15ce122dc6cd).html https://doi.org/10.1002/esp.4188 https://research-repository.st-andrews.ac.uk/bitstream/10023/15621/1/Mertes_et_al_2017_Earth_Surface_Processes_and_Landforms.pdf |
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/70b26d90-f0f6-418a-b887-15ce122dc6cd 2023-05-15T15:15:33+02:00 Using structure-from-motion to create glacier DEMs and orthoimagery from historical terrestrial and oblique aerial imagery Mertes, Jordan R. Gulley, Jason D. Benn, Douglas I. Thompson, Sarah S. Nicholson, Lindsey I. 2017-11 application/pdf https://risweb.st-andrews.ac.uk/portal/en/researchoutput/using-structurefrommotion-to-create-glacier-dems-and-orthoimagery-from-historical-terrestrial-and-oblique-aerial-imagery(70b26d90-f0f6-418a-b887-15ce122dc6cd).html https://doi.org/10.1002/esp.4188 https://research-repository.st-andrews.ac.uk/bitstream/10023/15621/1/Mertes_et_al_2017_Earth_Surface_Processes_and_Landforms.pdf eng eng info:eu-repo/semantics/openAccess Mertes , J R , Gulley , J D , Benn , D I , Thompson , S S & Nicholson , L I 2017 , ' Using structure-from-motion to create glacier DEMs and orthoimagery from historical terrestrial and oblique aerial imagery ' , Earth Surface Processes and Landforms , vol. 42 , no. 14 , pp. 2350-2364 . https://doi.org/10.1002/esp.4188 Structure-from-motion Historic imagery Dem Glacier change Long term article 2017 ftunstandrewcris https://doi.org/10.1002/esp.4188 2022-10-31T06:43:39Z Increased resolution and availability of remote sensing products, and advancements in small-scale aerial drone systems, allows observations of glacial changes at unprecedented levels of detail. Software developments, such as Structure from Motion (SfM), now allow users an easy and efficient method to generate 3D models and orthoimages from aerial or terrestrial datasets. While these advancements show promise for current and future glacier monitoring, many regions still suffer a lack of observations from earlier time periods. We report on the use of SfM to extract spatial information from various historic imagery sources. We focus on three geographic regions, the European Alps, High-Arctic Norway and the Nepal Himalaya. We used terrestrial field photos from 1896, high oblique aerial photos from 1936 and aerial handheld photos from 1978 to generate DEMs and orthophotos of the Rhone glacier, Brøggerhalvøya and the lower Khumbu glacier, respectively. Our analysis shows that applying SfM to historic imagery can generate high quality models using only ground control points. Limited camera/orientation information was largely reproduced using self-calibrated model data. Using these data, we calculated mean ground sampling distances across each site which demonstrates the high potential resolution of resulting models. Vertical errors for our models are ±5.4 m, ±5.2 m and ±3.3 m. Differencing shows similar patterns of thinning at lower Rhone (European Alps) and Brøggerhalvøya (Norway) glaciers, which have mean thinning rates of 0.31 m a -1 (1896-2010) to 0.86 m a -1 (1936-2010) respectively. On these clean ice glaciers thinning is highest in the terminus region and decreasing upglacier. In contrast to these glaciers, uneven topography, exposed ice-cliffs and debris cover on the Khumbu glacier create a highly variable spatial distribution of thinning. The mean thinning rate for the Khumbu study area was found to be 0.54±0.9 m a -1 (1978-2015). Article in Journal/Newspaper Arctic glacier University of St Andrews: Research Portal Arctic Brøggerhalvøya ENVELOPE(11.736,11.736,78.915,78.915) Norway Rhone ENVELOPE(158.733,158.733,-79.983,-79.983) Rhone Glacier ENVELOPE(162.200,162.200,-77.667,-77.667) Earth Surface Processes and Landforms 42 14 2350 2364 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
Structure-from-motion Historic imagery Dem Glacier change Long term |
spellingShingle |
Structure-from-motion Historic imagery Dem Glacier change Long term Mertes, Jordan R. Gulley, Jason D. Benn, Douglas I. Thompson, Sarah S. Nicholson, Lindsey I. Using structure-from-motion to create glacier DEMs and orthoimagery from historical terrestrial and oblique aerial imagery |
topic_facet |
Structure-from-motion Historic imagery Dem Glacier change Long term |
description |
Increased resolution and availability of remote sensing products, and advancements in small-scale aerial drone systems, allows observations of glacial changes at unprecedented levels of detail. Software developments, such as Structure from Motion (SfM), now allow users an easy and efficient method to generate 3D models and orthoimages from aerial or terrestrial datasets. While these advancements show promise for current and future glacier monitoring, many regions still suffer a lack of observations from earlier time periods. We report on the use of SfM to extract spatial information from various historic imagery sources. We focus on three geographic regions, the European Alps, High-Arctic Norway and the Nepal Himalaya. We used terrestrial field photos from 1896, high oblique aerial photos from 1936 and aerial handheld photos from 1978 to generate DEMs and orthophotos of the Rhone glacier, Brøggerhalvøya and the lower Khumbu glacier, respectively. Our analysis shows that applying SfM to historic imagery can generate high quality models using only ground control points. Limited camera/orientation information was largely reproduced using self-calibrated model data. Using these data, we calculated mean ground sampling distances across each site which demonstrates the high potential resolution of resulting models. Vertical errors for our models are ±5.4 m, ±5.2 m and ±3.3 m. Differencing shows similar patterns of thinning at lower Rhone (European Alps) and Brøggerhalvøya (Norway) glaciers, which have mean thinning rates of 0.31 m a -1 (1896-2010) to 0.86 m a -1 (1936-2010) respectively. On these clean ice glaciers thinning is highest in the terminus region and decreasing upglacier. In contrast to these glaciers, uneven topography, exposed ice-cliffs and debris cover on the Khumbu glacier create a highly variable spatial distribution of thinning. The mean thinning rate for the Khumbu study area was found to be 0.54±0.9 m a -1 (1978-2015). |
format |
Article in Journal/Newspaper |
author |
Mertes, Jordan R. Gulley, Jason D. Benn, Douglas I. Thompson, Sarah S. Nicholson, Lindsey I. |
author_facet |
Mertes, Jordan R. Gulley, Jason D. Benn, Douglas I. Thompson, Sarah S. Nicholson, Lindsey I. |
author_sort |
Mertes, Jordan R. |
title |
Using structure-from-motion to create glacier DEMs and orthoimagery from historical terrestrial and oblique aerial imagery |
title_short |
Using structure-from-motion to create glacier DEMs and orthoimagery from historical terrestrial and oblique aerial imagery |
title_full |
Using structure-from-motion to create glacier DEMs and orthoimagery from historical terrestrial and oblique aerial imagery |
title_fullStr |
Using structure-from-motion to create glacier DEMs and orthoimagery from historical terrestrial and oblique aerial imagery |
title_full_unstemmed |
Using structure-from-motion to create glacier DEMs and orthoimagery from historical terrestrial and oblique aerial imagery |
title_sort |
using structure-from-motion to create glacier dems and orthoimagery from historical terrestrial and oblique aerial imagery |
publishDate |
2017 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/using-structurefrommotion-to-create-glacier-dems-and-orthoimagery-from-historical-terrestrial-and-oblique-aerial-imagery(70b26d90-f0f6-418a-b887-15ce122dc6cd).html https://doi.org/10.1002/esp.4188 https://research-repository.st-andrews.ac.uk/bitstream/10023/15621/1/Mertes_et_al_2017_Earth_Surface_Processes_and_Landforms.pdf |
long_lat |
ENVELOPE(11.736,11.736,78.915,78.915) ENVELOPE(158.733,158.733,-79.983,-79.983) ENVELOPE(162.200,162.200,-77.667,-77.667) |
geographic |
Arctic Brøggerhalvøya Norway Rhone Rhone Glacier |
geographic_facet |
Arctic Brøggerhalvøya Norway Rhone Rhone Glacier |
genre |
Arctic glacier |
genre_facet |
Arctic glacier |
op_source |
Mertes , J R , Gulley , J D , Benn , D I , Thompson , S S & Nicholson , L I 2017 , ' Using structure-from-motion to create glacier DEMs and orthoimagery from historical terrestrial and oblique aerial imagery ' , Earth Surface Processes and Landforms , vol. 42 , no. 14 , pp. 2350-2364 . https://doi.org/10.1002/esp.4188 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/esp.4188 |
container_title |
Earth Surface Processes and Landforms |
container_volume |
42 |
container_issue |
14 |
container_start_page |
2350 |
op_container_end_page |
2364 |
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1766345926181388288 |