Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XXXIX-B4, 295-300, 2012
http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XXXIX-B4/295/2012/
doi:10.5194/isprsarchives-XXXIX-B4-295-2012
© Author(s) 2012. This work is distributed
under the Creative Commons Attribution 3.0 License.
 
31 Jul 2012
EVALUATION OF ASTER GDEM v.2 USING GPS CHECKPOINTS, OSGB DEM VALUES AND PHOTOGAMMETRICALLY DERIVED DEMS
H. Sadeq, J. Drummond, and Z. Li School of Geographical and Earth Sciences, College of Science and Engineering, University of Glasgow, G12 8QQ, UK
Keywords: ASTER GDEM, accuracy, bias, test-sites, slope-effect, coastal-effect Abstract. A 2010 study examining ASTER GDEM v1 data revealed accuracies of 12-25m and strong negative discrepancy biases compared to precise GPS observations, in several test sites in China. Rather than further investigating these, with the advent of ASTER GDEM v2 a new series of tests, also using precise GPS observations but also other DEMs, was performed. In these tests better than the expected 17m accuracies were found (RMSE values of 3.9m to 15.3m) and no strong biases.
Conference paper (PDF, 1378 KB)


Citation: Sadeq, H., Drummond, J., and Li, Z.: EVALUATION OF ASTER GDEM v.2 USING GPS CHECKPOINTS, OSGB DEM VALUES AND PHOTOGAMMETRICALLY DERIVED DEMS, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XXXIX-B4, 295-300, doi:10.5194/isprsarchives-XXXIX-B4-295-2012, 2012.

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