IGB

Connexion

(Article of periodic en Anglais - 2014)

Document title

Digital elevation models derived from airborne laser scanning point clouds : appropriate spatial resolutions for multi-temporal characterization and quantification of geomorphological processes

Authors(s) and Affiliation(s)

SAILER R. (1 2) ; RUTZINGER M. (1 3) ; RIEG L. (1) ; WICHMANN V. (2) ;
(1) Inst. of Geography, Univ., Innsbruck, AUTRICHE
(2) alpS - Centre for Climate Change Adaptation Technologies, Innsbruck, AUTRICHE
(3) Inst. for Interdisciplinary Mountain Research, Austrian Academy of Sciences, Innsbruck, AUTRICHE

Abstract

In this study, an extensive, multi-temporal set of airborne laser scanning (ALS) data is used to investigate the accuracy of topographic change calculations in a high alpine environment, caused by different geomorphic processes. Differences from digital terrain models (DTMs) with cell sizes ranging from 0.25 m to 10 m were calculated and compared to very accurate point-to-point calculations for a variety of processes and in nearby stable areas which show no significant surface changes. The representativeness of the DTM differences is then compared to the terrain slope and surface roughness of the investigated areas to show the influence of these parameters on the errors in the differences. Those errors are then taken into account for analyses of the applicability of different cell sizes for the investigation of geomorphic processes with different magnitudes and over different time periods. The analyses show that the error of DTM differences increases with lower point densities and higher roughness and slope values

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2014, vol. 39, no2 [pp. 272-284]

Bibliographic references : 1 p.

Collation : 13 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3490

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
Refdoc record number (ud4) : 28518550 : Permanent link - XML version
Powered by Pxxo