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Comparison and validation of recent free Comparison and validation of recent free... - PDF Document (695 K)
Citation Hirt, C. and Filmer, M.S. and Featherstone, W.E. 2010. Comparison and validation of recent freely-available ASTER-GDEM ver1, SRTM ver4.1 and GEODATA DEM-9S ver3 digital elevation models over Australia. Australian Journal of Earth Sciences. 57 (3): pp. 337-347.
Author Hirt, Christian
Author Filmer, Michael
Author Featherstone, Will
Title Comparison and validation of recent freely-available ASTER-GDEM ver1, SRTM ver4.1 and GEODATA DEM-9S ver3 digital elevation models over Australia
Date 2010
Abstract This study investigates the quality (in terms of elevation accuracy and systematic errors) of three recent publicly available elevation model datasets over Australia: (i) the 9 arc second national GEODATA DEM-9S ver3 from Geoscience Australia and the Australian National University; (ii) the 3 arc second SRTM ver4.1 from CGIAR-CSI; and (iii) the 1 arc second ASTER-GDEM ver1 from NASA/METI. The main features of these datasets are reported from a geodetic point of view. Comparison at about 1 billion locations identifies artefacts (e.g. residual cloud patterns and stripe effects) in ASTER. For DEM-9S, the comparisons against the space-collected SRTM and ASTER models demonstrate that signal omission (due to the ~270 m spacing) may cause errors of the order of 100-200 m in some rugged areas of Australia. Based on a set of geodetic ground control points over Western Australia, the vertical accuracy of DEM-9S is ~9 m, SRTM ~6 m and ASTER ~15 m. However, these values vary as a function of the terrain type and shape. Thus, CGIAR-CSI SRTM ver4.1 may represent a viable alternative to DEM-9S for some applications. While ASTER GDEM has an unprecedented horizontal resolution of ~30 m, systematic errors present in this research-grade version of the ASTER GDEM ver1 will impede its immediate use for some applications.
Subjects ASTER-GDEM ver1, Australia, digital elevation models, GEODATA DEM-9S ver3, geodesy, SRTM ver4.1
Department Department of Spatial Sciences
Additional Information If you wish to contact a Curtin researcher associated with this document, you may obtain an email address from http://findservice.curtin.edu.au/searchcurtinstaff.html.
Alternative Location http://dx.doi.org/10.1080/08120091003677553
Access Status open access - see also Alternative Location
Doc. Type Journal Article
PID 137777
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