Assessing vertical terrain displacement from TLS data by applying Msplit estimation, theoretical analysis

[EN] Terrestrial laser scanning (TLS) is a measurement technique that has become popular in the last decades. Measurement results, usually as a point cloud, contain many points measured. When the TLS technique is used to determine terrain surface (e.g., by determining terrain profiles), one should r...

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Detalhes bibliográficos
Autores: Wyszkowska, Patrycja, Duchnowski, Robert
Formato: capítulo de livro
Fecha de publicación:2023
País:España
Recursos:Universitat Politècnica de València (UPV)
Repositorio:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
Idioma:inglés
OAI Identifier:oai:riunet.upv.es:10251/192155
Acesso em linha:https://riunet.upv.es/handle/10251/192155
Access Level:acceso abierto
Palavra-chave:Terrestrial laser scanning (TLS)
Msplit estimation
Vertical displacement
Deformation analysis
Robust estimation
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spelling Assessing vertical terrain displacement from TLS data by applying Msplit estimation, theoretical analysisWyszkowska, PatrycjaDuchnowski, RobertTerrestrial laser scanning (TLS)Msplit estimationVertical displacementDeformation analysisRobust estimation[EN] Terrestrial laser scanning (TLS) is a measurement technique that has become popular in the last decades. Measurement results, usually as a point cloud, contain many points measured. When the TLS technique is used to determine terrain surface (e.g., by determining terrain profiles), one should realize that some points measured do not concern the terrain surface itself, but trees, shrubs, or generally the vegetation cover. Considering terrain surface determination, they should be regarded as outliers. Some other observations can also be outliers of different origins; for example, they might be disturbed by gross errors. We should consider such observation types when the data are processed. Two leading solutions in such a context are data cleaning and the application of robust estimation methods. Robust M-estimation is the most popular for the latter approach. As an alternative, one can also consider the application of Msplit estimation, in which the functional model is split into two competing ones. Hence, the paper aims to analyze how Msplit estimation can assess vertical terrain displacement based on terrain profile determination from TLS data. We consider processing data in separate sets (two measurement epochs) or one combined set, a natural approach in Msplit estimation. The analyses based on simulated TLS data proved that the first solution seems better. Furthermore, the application of Msplit estimation can also provide more satisfactory results than the classical methods used in such a context.This research was funded by the Department of Geodesy, University of Warmia and Mazury in Olsztyn, Poland, statutory research no. 29.610.001-110Editorial Universitat Politècnica de ValènciaUniversity of Warmia and Mazury, PolandRepositorio Institucional de la Universitat Politècnica de València Riunet20232023-01-27book parthttp://purl.org/coar/resource_type/c_3248VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/bookPartapplication/pdfhttps://riunet.upv.es/handle/10251/192155reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valénciainstname:Universitat Politècnica de València (UPV)InglésengUWM UWMopen accesshttp://purl.org/coar/access_right/c_abf2Reconocimiento - No comercial - Compartir igual (by-nc-sa) http://creativecommons.org/licenses/by-nc-sa/4.0/info:eu-repo/semantics/openAccessoai:riunet.upv.es:10251/1921552026-06-13T07:49:27Z
dc.title.none.fl_str_mv Assessing vertical terrain displacement from TLS data by applying Msplit estimation, theoretical analysis
title Assessing vertical terrain displacement from TLS data by applying Msplit estimation, theoretical analysis
spellingShingle Assessing vertical terrain displacement from TLS data by applying Msplit estimation, theoretical analysis
Wyszkowska, Patrycja
Terrestrial laser scanning (TLS)
Msplit estimation
Vertical displacement
Deformation analysis
Robust estimation
title_short Assessing vertical terrain displacement from TLS data by applying Msplit estimation, theoretical analysis
title_full Assessing vertical terrain displacement from TLS data by applying Msplit estimation, theoretical analysis
title_fullStr Assessing vertical terrain displacement from TLS data by applying Msplit estimation, theoretical analysis
title_full_unstemmed Assessing vertical terrain displacement from TLS data by applying Msplit estimation, theoretical analysis
title_sort Assessing vertical terrain displacement from TLS data by applying Msplit estimation, theoretical analysis
dc.creator.none.fl_str_mv Wyszkowska, Patrycja
Duchnowski, Robert
author Wyszkowska, Patrycja
author_facet Wyszkowska, Patrycja
Duchnowski, Robert
author_role author
author2 Duchnowski, Robert
author2_role author
dc.contributor.none.fl_str_mv University of Warmia and Mazury, Poland
Repositorio Institucional de la Universitat Politècnica de València Riunet
dc.subject.none.fl_str_mv Terrestrial laser scanning (TLS)
Msplit estimation
Vertical displacement
Deformation analysis
Robust estimation
topic Terrestrial laser scanning (TLS)
Msplit estimation
Vertical displacement
Deformation analysis
Robust estimation
description [EN] Terrestrial laser scanning (TLS) is a measurement technique that has become popular in the last decades. Measurement results, usually as a point cloud, contain many points measured. When the TLS technique is used to determine terrain surface (e.g., by determining terrain profiles), one should realize that some points measured do not concern the terrain surface itself, but trees, shrubs, or generally the vegetation cover. Considering terrain surface determination, they should be regarded as outliers. Some other observations can also be outliers of different origins; for example, they might be disturbed by gross errors. We should consider such observation types when the data are processed. Two leading solutions in such a context are data cleaning and the application of robust estimation methods. Robust M-estimation is the most popular for the latter approach. As an alternative, one can also consider the application of Msplit estimation, in which the functional model is split into two competing ones. Hence, the paper aims to analyze how Msplit estimation can assess vertical terrain displacement based on terrain profile determination from TLS data. We consider processing data in separate sets (two measurement epochs) or one combined set, a natural approach in Msplit estimation. The analyses based on simulated TLS data proved that the first solution seems better. Furthermore, the application of Msplit estimation can also provide more satisfactory results than the classical methods used in such a context.
publishDate 2023
dc.date.none.fl_str_mv 2023
2023-01-27
dc.type.none.fl_str_mv book part
http://purl.org/coar/resource_type/c_3248
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/bookPart
format bookPart
dc.identifier.none.fl_str_mv https://riunet.upv.es/handle/10251/192155
url https://riunet.upv.es/handle/10251/192155
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv UWM UWM
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Reconocimiento - No comercial - Compartir igual (by-nc-sa)
http://creativecommons.org/licenses/by-nc-sa/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Reconocimiento - No comercial - Compartir igual (by-nc-sa)
http://creativecommons.org/licenses/by-nc-sa/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Editorial Universitat Politècnica de València
publisher.none.fl_str_mv Editorial Universitat Politècnica de València
dc.source.none.fl_str_mv reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
instname:Universitat Politècnica de València (UPV)
instname_str Universitat Politècnica de València (UPV)
reponame_str RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
collection RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
repository.name.fl_str_mv
repository.mail.fl_str_mv
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