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Comprehensive vertical accuracy analysis of freely available DEMs for different landscape types of the Rur catchment, Germany

Comprehensive vertical accuracy analysis of freely available DEMs for different landscape types... Abstract This study evaluates the vertical accuracy of nine freely available digital elevation models (DEMs) with a medium spatial resolution for a typical mid-latitude flat to hilly landscape in the Rur catchment in Germany. All datasets were evaluated with two reference datasets, a 1 m DEM and a highly precise set of elevation control points. The accuracy was evaluated with regard to different slopes, landforms and land use. The results reveal in flat areas an average error of 2–4 m which increases about two to three times in undulated terrain. Areas with dense tree cover show a mean error of 6–10 m. The highest accuracies were achieved by the SRTM DEM, followed by other DEMs that mainly implemented SRTM data. TanDEM-X and Copernicus DEM showed ambivalent results showing a higher ratio of existing errors in the elevation product for vegetation and water areas that prevent a higher overall accuracy of these DEMs. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Geocarto International Taylor & Francis

Comprehensive vertical accuracy analysis of freely available DEMs for different landscape types of the Rur catchment, Germany

Kramm, Tanja; Hoffmeister, Dirk
Geocarto International , Volume 37 (25): 26 – Dec 13, 2022
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References (90)

Publisher
Taylor & Francis
Copyright
© 2021 Informa UK Limited, trading as Taylor & Francis Group
ISSN
1752-0762
eISSN
1010-6049
DOI
10.1080/10106049.2021.1984588
Publisher site
See Article on Publisher Site

Abstract

Abstract This study evaluates the vertical accuracy of nine freely available digital elevation models (DEMs) with a medium spatial resolution for a typical mid-latitude flat to hilly landscape in the Rur catchment in Germany. All datasets were evaluated with two reference datasets, a 1 m DEM and a highly precise set of elevation control points. The accuracy was evaluated with regard to different slopes, landforms and land use. The results reveal in flat areas an average error of 2–4 m which increases about two to three times in undulated terrain. Areas with dense tree cover show a mean error of 6–10 m. The highest accuracies were achieved by the SRTM DEM, followed by other DEMs that mainly implemented SRTM data. TanDEM-X and Copernicus DEM showed ambivalent results showing a higher ratio of existing errors in the elevation product for vegetation and water areas that prevent a higher overall accuracy of these DEMs.

Journal

Geocarto International – Taylor & Francis

Published: Dec 13, 2022

Keywords: Accuracy assessment; digital terrain model; topography; land use; slope

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