On the accuracy of glacier outlines derived from remote sensing data
International audience Deriving glacier outlines from satellite data has become increasingly popular in the past decade. In particular when glacier outlines are used as a base for change assessment, it is important to know how accurate they are. Calculating the accuracy correctly is challenging, as...
Published in: | Annals of Glaciology |
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Main Authors: | , , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2013
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Subjects: | |
Online Access: | https://hal.science/hal-00846333 https://hal.science/hal-00846333/document https://hal.science/hal-00846333/file/div-class-title-on-the-accuracy-of-glacier-outlines-derived-from-remote-sensing-data-div.pdf https://doi.org/10.3189/2013AoG63A296 |
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Open Polar |
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Institut national des sciences de l'Univers: HAL-INSU |
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ftinsu |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Paul, Frank Barrand N., E. Berthier, Etienne Bolch, Tobias 14 Others, & On the accuracy of glacier outlines derived from remote sensing data |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Deriving glacier outlines from satellite data has become increasingly popular in the past decade. In particular when glacier outlines are used as a base for change assessment, it is important to know how accurate they are. Calculating the accuracy correctly is challenging, as appropriate reference data (e.g. from higher-resolution sensors) are seldom available. Moreover, after the required manual correction of the raw outlines (e.g. for debris cover), such a comparison would only reveal the accuracy of the analyst rather than of the algorithm applied. Here we compare outlines for clean and debris-covered glaciers, as derived from single and multiple digitizing by different or the same analysts on very high- (1 m) and medium-resolution (30 m) remote-sensing data, against each other and to glacier outlines derived from automated classification of Landsat Thematic Mapper data. Results show a high variability in the interpretation of debris-covered glacier parts, largely independent of the spatial resolution (area differences were up to 30%), and an overall good agreement for clean ice with sufficient contrast to the surrounding terrain (differences 5%). The differences of the automatically derived outlines from a reference value are as small as the standard deviation of the manual digitizations from several analysts. Based on these results, we conclude that automated mapping of clean ice is preferable to manual digitization and recommend using the latter method only for required corrections of incorrectly mapped glacier parts (e.g. debris cover, shadow). |
author2 |
Universität Zürich Zürich = University of Zurich (UZH) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) GLACIO LEGOS Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) Instituts für Kartographie Dresden (Institute for Cartography) Technische Universität Dresden = Dresden University of Technology (TU Dresden) |
format |
Article in Journal/Newspaper |
author |
Paul, Frank Barrand N., E. Berthier, Etienne Bolch, Tobias 14 Others, & |
author_facet |
Paul, Frank Barrand N., E. Berthier, Etienne Bolch, Tobias 14 Others, & |
author_sort |
Paul, Frank |
title |
On the accuracy of glacier outlines derived from remote sensing data |
title_short |
On the accuracy of glacier outlines derived from remote sensing data |
title_full |
On the accuracy of glacier outlines derived from remote sensing data |
title_fullStr |
On the accuracy of glacier outlines derived from remote sensing data |
title_full_unstemmed |
On the accuracy of glacier outlines derived from remote sensing data |
title_sort |
on the accuracy of glacier outlines derived from remote sensing data |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.science/hal-00846333 https://hal.science/hal-00846333/document https://hal.science/hal-00846333/file/div-class-title-on-the-accuracy-of-glacier-outlines-derived-from-remote-sensing-data-div.pdf https://doi.org/10.3189/2013AoG63A296 |
genre |
Annals of Glaciology |
genre_facet |
Annals of Glaciology |
op_source |
ISSN: 0260-3055 EISSN: 1727-5644 Annals of Glaciology https://hal.science/hal-00846333 Annals of Glaciology, 2013, 54 (63), pp.171-182. ⟨10.3189/2013AoG63A296⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3189/2013AoG63A296 hal-00846333 https://hal.science/hal-00846333 https://hal.science/hal-00846333/document https://hal.science/hal-00846333/file/div-class-title-on-the-accuracy-of-glacier-outlines-derived-from-remote-sensing-data-div.pdf doi:10.3189/2013AoG63A296 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3189/2013AoG63A296 |
container_title |
Annals of Glaciology |
container_volume |
54 |
container_issue |
63 |
container_start_page |
171 |
op_container_end_page |
182 |
_version_ |
1785578737714069504 |
spelling |
ftinsu:oai:HAL:hal-00846333v1 2023-12-17T10:18:41+01:00 On the accuracy of glacier outlines derived from remote sensing data Paul, Frank Barrand N., E. Berthier, Etienne Bolch, Tobias 14 Others, & Universität Zürich Zürich = University of Zurich (UZH) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) GLACIO LEGOS Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) Instituts für Kartographie Dresden (Institute for Cartography) Technische Universität Dresden = Dresden University of Technology (TU Dresden) 2013 https://hal.science/hal-00846333 https://hal.science/hal-00846333/document https://hal.science/hal-00846333/file/div-class-title-on-the-accuracy-of-glacier-outlines-derived-from-remote-sensing-data-div.pdf https://doi.org/10.3189/2013AoG63A296 en eng HAL CCSD Cambridge University Press info:eu-repo/semantics/altIdentifier/doi/10.3189/2013AoG63A296 hal-00846333 https://hal.science/hal-00846333 https://hal.science/hal-00846333/document https://hal.science/hal-00846333/file/div-class-title-on-the-accuracy-of-glacier-outlines-derived-from-remote-sensing-data-div.pdf doi:10.3189/2013AoG63A296 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0260-3055 EISSN: 1727-5644 Annals of Glaciology https://hal.science/hal-00846333 Annals of Glaciology, 2013, 54 (63), pp.171-182. ⟨10.3189/2013AoG63A296⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2013 ftinsu https://doi.org/10.3189/2013AoG63A296 2023-11-22T17:36:48Z International audience Deriving glacier outlines from satellite data has become increasingly popular in the past decade. In particular when glacier outlines are used as a base for change assessment, it is important to know how accurate they are. Calculating the accuracy correctly is challenging, as appropriate reference data (e.g. from higher-resolution sensors) are seldom available. Moreover, after the required manual correction of the raw outlines (e.g. for debris cover), such a comparison would only reveal the accuracy of the analyst rather than of the algorithm applied. Here we compare outlines for clean and debris-covered glaciers, as derived from single and multiple digitizing by different or the same analysts on very high- (1 m) and medium-resolution (30 m) remote-sensing data, against each other and to glacier outlines derived from automated classification of Landsat Thematic Mapper data. Results show a high variability in the interpretation of debris-covered glacier parts, largely independent of the spatial resolution (area differences were up to 30%), and an overall good agreement for clean ice with sufficient contrast to the surrounding terrain (differences 5%). The differences of the automatically derived outlines from a reference value are as small as the standard deviation of the manual digitizations from several analysts. Based on these results, we conclude that automated mapping of clean ice is preferable to manual digitization and recommend using the latter method only for required corrections of incorrectly mapped glacier parts (e.g. debris cover, shadow). Article in Journal/Newspaper Annals of Glaciology Institut national des sciences de l'Univers: HAL-INSU Annals of Glaciology 54 63 171 182 |