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Resolution sensitivity of a compound terrain derivative as computed from LiDAR-based elevation data


Straumann, Ralph K; Purves, Ross S (2007). Resolution sensitivity of a compound terrain derivative as computed from LiDAR-based elevation data. In: Fabrikant, Sara I; Wachowicz, Monica. The European information society. Leading the way with Geo-information. Berlin: Springer, 87-109.

Abstract

New technologies such as Light Detection And Ranging (LiDAR) provide high resolution digital elevation data. These data offer new possibilities in the field of terrain modelling and analysis. However, not very much is known about the effects when these data are used to compute broadly applied terrain derivatives. In this paper the sensitivity of the Topographic Wetness Index (TWI) and its two constituting components gradient and Specific Catchment Area (SCA) regarding the resolution of LiDAR-based elevation data is examined. For coarser resolutions a shift in the TWI distribution to higher values is noted. TWI distributions at different resolutions differ significantly from each other. These findings have an impact on aspatial and spatial modelling based on the TWI.

Abstract

New technologies such as Light Detection And Ranging (LiDAR) provide high resolution digital elevation data. These data offer new possibilities in the field of terrain modelling and analysis. However, not very much is known about the effects when these data are used to compute broadly applied terrain derivatives. In this paper the sensitivity of the Topographic Wetness Index (TWI) and its two constituting components gradient and Specific Catchment Area (SCA) regarding the resolution of LiDAR-based elevation data is examined. For coarser resolutions a shift in the TWI distribution to higher values is noted. TWI distributions at different resolutions differ significantly from each other. These findings have an impact on aspatial and spatial modelling based on the TWI.

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Additional indexing

Item Type:Book Section, refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Geography
Dewey Decimal Classification:910 Geography & travel
Language:English
Date:2007
Deposited On:29 Apr 2013 11:47
Last Modified:05 Apr 2016 16:46
Publisher:Springer
Series Name:Lecture Notes in Geoinformation and Cartography
Number:XVII
ISSN:1863-2351
ISBN:978-3-540-72384-4
Additional Information:The final publication is available at link.springer.com
Publisher DOI:https://doi.org/10.1007/978-3-540-72385-1_5

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