A Relief Dependent Evaluation of Digital Elevation Models on Different Scales for Northern Chile

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Title:Main Title: A Relief Dependent Evaluation of Digital Elevation Models on Different Scales for Northern Chile
Description:Abstract: Many geoscientific computations are directly influenced by the resolution and accuracy of digital elevation models (DEMs). Therefore, knowledge about the accuracy of DEMs is essential to avoid misleading results. In this study, a comprehensive evaluation of the vertical accuracy of globally available DEMs from Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), Shuttle Radar Topography Mission (SRTM), Advanced Land Observing Satellite (ALOS) World 3D and TanDEM-X WorldDEM™ was conducted for a large region in Northern Chile. Additionally, several very high-resolution DEM datasets were derived from Satellite Pour l’Observation de la Terre (SPOT) 6/7 and Pléiades stereo satellite imagery for smaller areas. All datasets were evaluated with three reference datasets, namely elevation points from both Ice, Cloud, and land Elevation (ICESat) satellites, as well as very accurate high-resolution elevation data derived by unmanned aerial vehicle (UAV)-based photogrammetry and terrestrial laser scanning (TLS). The accuracy was also evaluated with regard to the existing relief by relating the accuracy results to slope, terrain ruggedness index (TRI) and topographic position index (TPI). For all datasets with global availability, the highest overall accuracies are reached by TanDEM-X WorldDEM™ and the lowest by ASTER Global DEM (GDEM). On the local scale, Pléiades DEMs showed a slightly higher accuracy as SPOT imagery. Generally, accuracy highly depends on topography and the error is rising up to four times for high resolution DEMs and up to eight times for low-resolution DEMs in steeply sloped terrain compared to flat landscapes.
Identifier:10.3390/ijgi8100430 (DOI)
Citation Advice:Kramm, T.; Hoffmeister, D. A Relief Dependent Evaluation of Digital Elevation Models on Different Scales for Northern Chile. ISPRS Int. J. Geo-Inf. 2019, 8, 430.
Responsible Party
Creators:Tanja Kramm (Author), Dirk Hoffmeister (Author)
Funding Reference:Deutsche Forschungsgemeinschaft (DFG): CRC 1211: Earth - Evolution at the Dry Limit
Publisher:MDPI
Publication Year:2019
Topic
CRC1211 Topic:Remote Sensing
Related Subproject:Z2
Subjects:Keywords: Geomorphology, GIS, Remote Sensing
Geogr. Information Topic:Geoscientific Information
File Details
Filename:ijgi-08-00430-v2.pdf
Data Type:Text - Article
File Size:19.9 MB
Date:Available: 28.09.2019
Mime Type:application/pdf
Data Format:PDF
Language:English
Status:Completed
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Download Permission:Free
General Access and Use Conditions:According to the CRC1211DB data policy agreement.
Access Limitations:According to the CRC1211DB data policy agreement.
Licence:[Creative Commons] Attribution 4.0 International (CC BY 4.0)
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Specific Information - Publication
Publication Status:Published
Review Status:Peer reviewed
Publication Type:Article
Article Type:Journal
Source:International Journal of Geo-Information
Issue:10
Volume:8
Number of Pages:7 (430 - 436)
Metadata Details
Metadata Creator:Dirk Hoffmeister
Metadata Created:01.10.2019
Metadata Last Updated:01.10.2019
Subproject:Z2
Funding Phase:1
Metadata Language:English
Metadata Version:V50
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