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Accuracy of automatically extracted geomorphological breaklines from airborne LiDAR curvarure images

Concepts and implications of environmental change and human impact : studies from Austrian geomorphological research

Auteur(s) et Affiliation(s)

RUTZINGER, M.
Inst. of Geography, Univ., Innsbruck, Autriche
Inst. of Mountain Research : Man and Environment, Austrian Academy of Sciences, Innsbruck, Autriche
HÖFLE, B.
Inst. of Geography, Chair of GIScience, Univ., Heidelberg, Allemagne
KRINGER, K.
Inst. of Geography, Univ., Innsbruck, Autriche
KEILER, M.
Inst. of Geography, Univ., Bern, Suisse
Dep. of Geography and Regional Science, Univ., Graz, Autriche
Inst. of Remote Sensing and Photogrammetry, Univ. of Technology, Graz, Autriche
OTTO, J.-C.
Dep. of Geography and Geology, Univ., Salzburg, Autriche


Description :
The AA. investigate on the quality of breaklines derived from digital terrain models (DTMs) acquired with airborne laser scanning (ALS) in regions with high curvature. The test site is located in the Wipptal south of Innsbruck and is part of the terraces formed during and after the last glaciation. Selected components of the breakline detection workflow are analysed. In addition, the reliability of manually digitized reference lines is investigated. Selected geometric properties such as line length, slope and sinuosity are computed and compared to reference data. The properties are discussed regarding their explanatory power with respect to accuracy and precision. Automatic extraction results strongly differ from manually digitized breaklines. Breaklines from manual digitalization are found to vary in coverage and spatial accuracy and thus reflect always the operator's ability, perception and intention. The advantage of automated extracted breaklines is their reproducibility and adaptability to scale.


Type de document :
Article de monographie

Source :
Geografiska annaler. Series A. Physical geography, issn : 0435-3676, 2012, vol. 94, n°. 1, p. 33-42, nombre de pages : 10, Références bibliographiques : 20 ref.

Date :
2012

Editeur :
Pays édition : Suede, Stockholm, Svenska sällskapet för antropologi och geografi

Langue :
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)