An Object-Based Approach for Mapping Tundra Ice-Wedge Polygon Troughs from Very High Spatial Resolution Optical Satellite Imagery
Very high spatial resolution commercial satellite imagery can inform observation, mapping, and documentation of micro-topographic transitions across large tundra regions. The bridging of fine-scale field studies with pan-Arctic system assessments has until now been constrained by a lack of overlap i...
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2021
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Online Access: | https://doi.org/10.3390/rs13040558 https://doaj.org/article/e1abf49d880f420eb9d81a837fc9db1a |
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ftdoajarticles:oai:doaj.org/article:e1abf49d880f420eb9d81a837fc9db1a 2024-01-07T09:41:13+01:00 An Object-Based Approach for Mapping Tundra Ice-Wedge Polygon Troughs from Very High Spatial Resolution Optical Satellite Imagery Chandi Witharana Md Abul Ehsan Bhuiyan Anna K. Liljedahl Mikhail Kanevskiy Torre Jorgenson Benjamin M. Jones Ronald Daanen Howard E. Epstein Claire G. Griffin Kelcy Kent Melissa K. Ward Jones 2021-02-01T00:00:00Z https://doi.org/10.3390/rs13040558 https://doaj.org/article/e1abf49d880f420eb9d81a837fc9db1a EN eng MDPI AG https://www.mdpi.com/2072-4292/13/4/558 https://doaj.org/toc/2072-4292 doi:10.3390/rs13040558 2072-4292 https://doaj.org/article/e1abf49d880f420eb9d81a837fc9db1a Remote Sensing, Vol 13, Iss 4, p 558 (2021) Arctic permafrost OBIA commercial imagery ice-wedge polygons troughs Science Q article 2021 ftdoajarticles https://doi.org/10.3390/rs13040558 2023-12-10T01:47:50Z Very high spatial resolution commercial satellite imagery can inform observation, mapping, and documentation of micro-topographic transitions across large tundra regions. The bridging of fine-scale field studies with pan-Arctic system assessments has until now been constrained by a lack of overlap in spatial resolution and geographical coverage. This likely introduced biases in climate impacts on, and feedback from the Arctic region to the global climate system. The central objective of this exploratory study is to develop an object-based image analysis workflow to automatically extract ice-wedge polygon troughs from very high spatial resolution commercial satellite imagery. We employed a systematic experiment to understand the degree of interoperability of knowledge-based workflows across distinct tundra vegetation units—sedge tundra and tussock tundra—focusing on the same semantic class. In our multi-scale trough modelling workflow, we coupled mathematical morphological filtering with a segmentation process to enhance the quality of image object candidates and classification accuracies. Employment of the master ruleset on sedge tundra reported classification accuracies of correctness of 0.99, completeness of 0.87, and F1 score of 0.92. When the master ruleset was applied to tussock tundra without any adaptations, classification accuracies remained promising while reporting correctness of 0.87, completeness of 0.77, and an F1 score of 0.81. Overall, results suggest that the object-based image analysis-based trough modelling workflow exhibits substantial interoperability across the terrain while producing promising classification accuracies. From an Arctic earth science perspective, the mapped troughs combined with the ArcticDEM can allow hydrological assessments of lateral connectivity of the rapidly changing Arctic tundra landscape, and repeated mapping can allow us to track fine-scale changes across large regions and that has potentially major implications on larger riverine systems. Article in Journal/Newspaper Arctic Ice permafrost Tundra wedge* Directory of Open Access Journals: DOAJ Articles Arctic Remote Sensing 13 4 558 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic permafrost OBIA commercial imagery ice-wedge polygons troughs Science Q |
spellingShingle |
Arctic permafrost OBIA commercial imagery ice-wedge polygons troughs Science Q Chandi Witharana Md Abul Ehsan Bhuiyan Anna K. Liljedahl Mikhail Kanevskiy Torre Jorgenson Benjamin M. Jones Ronald Daanen Howard E. Epstein Claire G. Griffin Kelcy Kent Melissa K. Ward Jones An Object-Based Approach for Mapping Tundra Ice-Wedge Polygon Troughs from Very High Spatial Resolution Optical Satellite Imagery |
topic_facet |
Arctic permafrost OBIA commercial imagery ice-wedge polygons troughs Science Q |
description |
Very high spatial resolution commercial satellite imagery can inform observation, mapping, and documentation of micro-topographic transitions across large tundra regions. The bridging of fine-scale field studies with pan-Arctic system assessments has until now been constrained by a lack of overlap in spatial resolution and geographical coverage. This likely introduced biases in climate impacts on, and feedback from the Arctic region to the global climate system. The central objective of this exploratory study is to develop an object-based image analysis workflow to automatically extract ice-wedge polygon troughs from very high spatial resolution commercial satellite imagery. We employed a systematic experiment to understand the degree of interoperability of knowledge-based workflows across distinct tundra vegetation units—sedge tundra and tussock tundra—focusing on the same semantic class. In our multi-scale trough modelling workflow, we coupled mathematical morphological filtering with a segmentation process to enhance the quality of image object candidates and classification accuracies. Employment of the master ruleset on sedge tundra reported classification accuracies of correctness of 0.99, completeness of 0.87, and F1 score of 0.92. When the master ruleset was applied to tussock tundra without any adaptations, classification accuracies remained promising while reporting correctness of 0.87, completeness of 0.77, and an F1 score of 0.81. Overall, results suggest that the object-based image analysis-based trough modelling workflow exhibits substantial interoperability across the terrain while producing promising classification accuracies. From an Arctic earth science perspective, the mapped troughs combined with the ArcticDEM can allow hydrological assessments of lateral connectivity of the rapidly changing Arctic tundra landscape, and repeated mapping can allow us to track fine-scale changes across large regions and that has potentially major implications on larger riverine systems. |
format |
Article in Journal/Newspaper |
author |
Chandi Witharana Md Abul Ehsan Bhuiyan Anna K. Liljedahl Mikhail Kanevskiy Torre Jorgenson Benjamin M. Jones Ronald Daanen Howard E. Epstein Claire G. Griffin Kelcy Kent Melissa K. Ward Jones |
author_facet |
Chandi Witharana Md Abul Ehsan Bhuiyan Anna K. Liljedahl Mikhail Kanevskiy Torre Jorgenson Benjamin M. Jones Ronald Daanen Howard E. Epstein Claire G. Griffin Kelcy Kent Melissa K. Ward Jones |
author_sort |
Chandi Witharana |
title |
An Object-Based Approach for Mapping Tundra Ice-Wedge Polygon Troughs from Very High Spatial Resolution Optical Satellite Imagery |
title_short |
An Object-Based Approach for Mapping Tundra Ice-Wedge Polygon Troughs from Very High Spatial Resolution Optical Satellite Imagery |
title_full |
An Object-Based Approach for Mapping Tundra Ice-Wedge Polygon Troughs from Very High Spatial Resolution Optical Satellite Imagery |
title_fullStr |
An Object-Based Approach for Mapping Tundra Ice-Wedge Polygon Troughs from Very High Spatial Resolution Optical Satellite Imagery |
title_full_unstemmed |
An Object-Based Approach for Mapping Tundra Ice-Wedge Polygon Troughs from Very High Spatial Resolution Optical Satellite Imagery |
title_sort |
object-based approach for mapping tundra ice-wedge polygon troughs from very high spatial resolution optical satellite imagery |
publisher |
MDPI AG |
publishDate |
2021 |
url |
https://doi.org/10.3390/rs13040558 https://doaj.org/article/e1abf49d880f420eb9d81a837fc9db1a |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Ice permafrost Tundra wedge* |
genre_facet |
Arctic Ice permafrost Tundra wedge* |
op_source |
Remote Sensing, Vol 13, Iss 4, p 558 (2021) |
op_relation |
https://www.mdpi.com/2072-4292/13/4/558 https://doaj.org/toc/2072-4292 doi:10.3390/rs13040558 2072-4292 https://doaj.org/article/e1abf49d880f420eb9d81a837fc9db1a |
op_doi |
https://doi.org/10.3390/rs13040558 |
container_title |
Remote Sensing |
container_volume |
13 |
container_issue |
4 |
container_start_page |
558 |
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1787422042257096704 |