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GIScience & Remote Sensing Volume 49, 2012 - Issue 6
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Original Articles

Accuracy Evaluation of an ASTER-Derived Global Digital Elevation Model (GDEM) Version 1 and Version 2 for Two Sites in Western Africa

Peter G. Chirico U. S. Geological Survey, Reston, VA
,
Katherine C. Malpeli U. S. Geological Survey, Reston, VA
&
Sarah M. Trimble Texas A&M University
Pages 775-801 | Published online: 15 May 2013
 
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Abstract

This study compares the ASTER Global DEM version 1 (GDEMv1) and version 2 (GDEMv2) for two study sites with distinct terrain and land cover characteristics in western Africa. The effects of land cover, slope, relief, and stack number are evaluated through both absolute and relative DEM statistical comparisons. While GDEMv2 at times performed better than GDEMv1, this improvement was not consistent, revealing the complex nature and interaction of terrain and land cover characteristics, which influences the accuracy of GDEM tiles on local and regional scales.

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