ISPRS-Archives The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ISPRS-Archives Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci. 2194-9034 Copernicus Publications Göttingen, Germany 10.5194/isprs-archives-XLII-4-W4-173-2017 STACK NUMBER INFLUENCE ON THE ACCURACY OF ASTER GDEM (V2) Mirzadeh S. M. J. 2 Alizadeh Naeini A. 1 Fatemi S. B. 1 University of Isfahan, Department of Geomatics Engineering, Faculty of Civil Engineering and Transportation, Isfahan, Iran K. N. TOOSI University of Technology, Faculty of Geodesy and Geomatics Engineering, Tehran, Iran 26 09 2017 XLII-4/W4 173 177 Copyright: © 2017 S. M. J. Mirzadeh et al. 2017 This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/ This article is available from https://isprs-archives.copernicus.org/articles/XLII-4-W4/173/2017/isprs-archives-XLII-4-W4-173-2017.html The full text article is available as a PDF file from https://isprs-archives.copernicus.org/articles/XLII-4-W4/173/2017/isprs-archives-XLII-4-W4-173-2017.pdf

In this research, the influence of stack number (STKN) on the accuracy of Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Global DEM (GDEM) has been investigated. For this purpose, two data sets of ASTER and Reference DEMs from two study areas with various topography (Bomehen and Tazehabad) were used. The Results show that in both study areas, STKN of 19 results in minimum error so that this minimum error has small difference with other STKN. The analysis of slope, STKN, and error values shows that there is no strong correlation between these parameters in both study areas. For example, the value of mean absolute error increase by changing the topography and the increase of slope values and height on cells but, the changes in STKN has no important effect on error values. Furthermore, according to high values of STKN, effect of slope on elevation accuracy has practically decreased. Also, there is no great correlation between the residual and STKN in ASTER GDEM.