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Comparison and validation of the recent freely available ASTER-GDEM ver1, SRTM ver4.1 and GEODATA DEM-9S ver3 digital elevation models over Australia
| Content Provider | Scilit |
|---|---|
| Author | Hirt, C. Filmer, Mick Featherstone, Will |
| Copyright Year | 2010 |
| Description | 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. |
| Related Links | https://espace.curtin.edu.au/bitstream/20.500.11937/43846/2/137777_137777.pdf |
| Ending Page | 347 |
| Page Count | 11 |
| Starting Page | 337 |
| ISSN | 08120099 |
| e-ISSN | 14400952 |
| DOI | 10.1080/08120091003677553 |
| Journal | Australian Journal of Earth Sciences |
| Issue Number | 3 |
| Volume Number | 57 |
| Language | English |
| Publisher | Informa UK Limited |
| Publisher Date | 2010-03-26 |
| Access Restriction | Open |
| Subject Keyword | Remote Sensing Aster-gdem Ver1 Australia Digital Elevation Models Geodata Dem-9s Ver3 Geodesy Srtm Ver4.1 |
| Content Type | Text |
| Resource Type | Article |
| Subject | Earth and Planetary Sciences |
