Error Characteristics of Pan-Arctic Digital Elevation Models and Elevation Derivatives in Northern Sweden

Many biochemical processes and dynamics are strongly controlled by terrain topography, making digital elevation models (DEM) a fundamental dataset for a range of applications. This study investigates the quality of four pan-Arctic DEMs (Arctic DEM, ASTER DEM, ALOS DEM and Copernicus DEM) within the...

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Autores principales:	Martin Karlson, David Bastviken, Heather Reese
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	digital elevation model accuracy assessment elevation derivatives terrain Arctic region land cover Science Q
Acceso en línea:	https://doaj.org/article/730eefba70ed45389b0cd4c836f0a737
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spelling	oai:doaj.org-article:730eefba70ed45389b0cd4c836f0a7372021-11-25T18:55:08ZError Characteristics of Pan-Arctic Digital Elevation Models and Elevation Derivatives in Northern Sweden10.3390/rs132246532072-4292https://doaj.org/article/730eefba70ed45389b0cd4c836f0a7372021-11-01T00:00:00Zhttps://www.mdpi.com/2072-4292/13/22/4653https://doaj.org/toc/2072-4292Many biochemical processes and dynamics are strongly controlled by terrain topography, making digital elevation models (DEM) a fundamental dataset for a range of applications. This study investigates the quality of four pan-Arctic DEMs (Arctic DEM, ASTER DEM, ALOS DEM and Copernicus DEM) within the Kalix River watershed in northern Sweden, with the aim of informing users about the quality when comparing these DEMs. The quality assessment focuses on both the vertical accuracy of the DEMs and their abilities to model two fundamental elevation derivatives, including topographic wetness index (TWI) and landform classification. Our results show that the vertical accuracy is relatively high for Arctic DEM, ALOS and Copernicus and in our study area was slightly better than those reported in official validation results. Vertical errors are mainly caused by tree cover characteristics and terrain slope. On the other hand, the high vertical accuracy does not translate directly into high quality elevation derivatives, such as TWI and landform classes, as shown by the large errors in TWI and landform classification for all four candidate DEMs. Copernicus produced elevation derivatives with results most similar to those from the reference DEM, but the errors are still relatively high, with large underestimation of TWI in land cover classes with a high likelihood of being wet. Overall, the Copernicus DEM produced the most accurate elevation derivatives, followed by slightly lower accuracies from Arctic DEM and ALOS, and the least accurate being ASTER.Martin KarlsonDavid BastvikenHeather ReeseMDPI AGarticledigital elevation modelaccuracy assessmentelevation derivativesterrainArctic regionland coverScienceQENRemote Sensing, Vol 13, Iss 4653, p 4653 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	digital elevation model accuracy assessment elevation derivatives terrain Arctic region land cover Science Q
spellingShingle	digital elevation model accuracy assessment elevation derivatives terrain Arctic region land cover Science Q Martin Karlson David Bastviken Heather Reese Error Characteristics of Pan-Arctic Digital Elevation Models and Elevation Derivatives in Northern Sweden
description	Many biochemical processes and dynamics are strongly controlled by terrain topography, making digital elevation models (DEM) a fundamental dataset for a range of applications. This study investigates the quality of four pan-Arctic DEMs (Arctic DEM, ASTER DEM, ALOS DEM and Copernicus DEM) within the Kalix River watershed in northern Sweden, with the aim of informing users about the quality when comparing these DEMs. The quality assessment focuses on both the vertical accuracy of the DEMs and their abilities to model two fundamental elevation derivatives, including topographic wetness index (TWI) and landform classification. Our results show that the vertical accuracy is relatively high for Arctic DEM, ALOS and Copernicus and in our study area was slightly better than those reported in official validation results. Vertical errors are mainly caused by tree cover characteristics and terrain slope. On the other hand, the high vertical accuracy does not translate directly into high quality elevation derivatives, such as TWI and landform classes, as shown by the large errors in TWI and landform classification for all four candidate DEMs. Copernicus produced elevation derivatives with results most similar to those from the reference DEM, but the errors are still relatively high, with large underestimation of TWI in land cover classes with a high likelihood of being wet. Overall, the Copernicus DEM produced the most accurate elevation derivatives, followed by slightly lower accuracies from Arctic DEM and ALOS, and the least accurate being ASTER.
format	article
author	Martin Karlson David Bastviken Heather Reese
author_facet	Martin Karlson David Bastviken Heather Reese
author_sort	Martin Karlson
title	Error Characteristics of Pan-Arctic Digital Elevation Models and Elevation Derivatives in Northern Sweden
title_short	Error Characteristics of Pan-Arctic Digital Elevation Models and Elevation Derivatives in Northern Sweden
title_full	Error Characteristics of Pan-Arctic Digital Elevation Models and Elevation Derivatives in Northern Sweden
title_fullStr	Error Characteristics of Pan-Arctic Digital Elevation Models and Elevation Derivatives in Northern Sweden
title_full_unstemmed	Error Characteristics of Pan-Arctic Digital Elevation Models and Elevation Derivatives in Northern Sweden
title_sort	error characteristics of pan-arctic digital elevation models and elevation derivatives in northern sweden
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/730eefba70ed45389b0cd4c836f0a737
work_keys_str_mv	AT martinkarlson errorcharacteristicsofpanarcticdigitalelevationmodelsandelevationderivativesinnorthernsweden AT davidbastviken errorcharacteristicsofpanarcticdigitalelevationmodelsandelevationderivativesinnorthernsweden AT heatherreese errorcharacteristicsofpanarcticdigitalelevationmodelsandelevationderivativesinnorthernsweden
_version_	1718410530234826752

Error Characteristics of Pan-Arctic Digital Elevation Models and Elevation Derivatives in Northern Sweden

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