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Artefacts in marine digital terrain models: A multiscale analysis of their impact on the derivation of terrain attributes

Lecours Vincent, Devillers Rodolphe, Lucieer Vanessa L. et Brown Craig J.. (2017). Artefacts in marine digital terrain models: A multiscale analysis of their impact on the derivation of terrain attributes. IEEE Transactions on Geoscience and Remote Sensing, 55, (9), p. 5391-5406.

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URL officielle: https://doi.org/10.1109/TGRS.2017.2707303

Résumé

Data acquisition artefacts are commonly found in multibeam bathymetric data, but their effects on mapping methodologies using geographic information system techniques have not been widely explored. Artefacts have been extensively studied in terrestrial settings, but their study in a marine context has currently been limited to engineering and surveying technology development in order to reduce their amplitude during data collection and postprocessing. Knowledge on how they propagate to further analyses like environmental characterization or terrain analysis is scant. The goal of this paper is to describe the contribution of different types of artefacts to marine terrain attributes at multiple scales. Using multibeam bathymetric data from German Bank, off Nova Scotia (Canada), digital bathymetric models (DBMs) were computed at five different spatial resolutions. Ten different amplitudes of heave, pitch, roll, and time artefacts were artificially introduced to generate altered DBMs. Then, six terrain attributes were derived from each of the reference and altered DBMs. Relationships between the amplitude of artefacts and the statistical and spatial distributions of: 1) altered bathymetry and terrain attributes surfaces and 2) errors caused by the artefacts were modeled. Spatial similarity between altered and reference surfaces was also assessed. Results indicate that most artefacts impact spatial similarity and that pitch and roll significantly impact the statistical distribution of DBMs and terrain attributes while time and heave artefacts have a more subtle impact. Results also confirm the relationship between spatial data quality and spatial scale, as finer-scale data were impacted by artefacts to a greater degree than broader-scale data.

Type de document:Article publié dans une revue avec comité d'évaluation
ISSN:0196-2892
Volume:55
Numéro:9
Pages:p. 5391-5406
Version évaluée par les pairs:Oui
Date:Septembre 2017
Nombre de pages:16
Identifiant unique:10.1109/TGRS.2017.2707303
Sujets:Sciences naturelles et génie > Sciences mathématiques > Informatique
Sciences naturelles et génie > Sciences naturelles > Sciences de la terre (géologie, géographie)
Département, module, service et unité de recherche:Départements et modules > Département des sciences fondamentales
Unités de recherche > Centre de recherche sur la Boréalie (CREB)
Mots-clés:artefacts, digital terrain model, DTM, error propagation, marine geomorphometry, multibeam bathymetry, terrain analysis
Déposé le:23 mai 2024 19:32
Dernière modification:23 mai 2024 19:32
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