Evaluation of ASTER GDEM v.2 using GPS checkpoints, OSGB DEM values and photogammetrically derived DEMs

Sadeq, H., Drummond, J. and Li, Z. (2012) Evaluation of ASTER GDEM v.2 using GPS checkpoints, OSGB DEM values and photogammetrically derived DEMs. In: XXII Conference of International Society of Photogrammetry and Remote Sensing, Melbourne, Australia, 24 Aug - 3 Sep 2012,

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.

• Item Type: Conference Proceedings
• Keywords: ASTER GDEM, accuracy, bias, test-sites, slope-effect, coastal-effect
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Li, Dr Zhenhong and Drummond, Dr Jane
• Authors: Sadeq, H., Drummond, J., and Li, Z.
• Subjects: G Geography. Anthropology. Recreation > GA Mathematical geography. Cartography
• College/School: College of Science and Engineering > School of Geographical and Earth Sciences
• Research Group: ESRG