Volume XXXIX-B4
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XXXIX-B4, 295-300, 2012
https://doi.org/10.5194/isprsarchives-XXXIX-B4-295-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XXXIX-B4, 295-300, 2012
https://doi.org/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

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 H. Sadeq et al.
  • 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.