Evaluating Information Loss of SRTM DEM Data with Different Grid Sizes
Publication: Journal of Surveying Engineering
Volume 140, Issue 4
Abstract
The digital elevation products produced by the Shuttle Radar Topography Mission (SRTM) are disseminated with different resolutions. This study investigates the differences in information content between different resolutions. Three 1° cells are selected to represent flat area, moderate terrain, and mountain ranges. All of these cells are located in the continental territory of the United States. The theory of information loss caused by the sampling density is shown with the increasing deviation from the reference in the experiment. The error resulting from bilinear interpolation is also assessed. The experimental result also indicates that if the 1-arcsecond SRTM, digital elevation model (DEM) is released for global coverage, the height accuracy would be improved over the 3-arcsecond product.
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Acknowledgments
The author thanks Prof. Peter Guth, Department of Oceanography, U.S. Naval Academy, for his great contribution of MicroDEM software and his constructive suggestions and assistance during this research. The author is grateful to the anonymous reviewers for valuable comments and suggestions, which greatly improved the paper.
References
Acharya, B., and Chaturvedi, A. (1997). “Digital terrain model: Elevation extraction and accuracy assessment.” J. Surv. Eng., 71–76.
Aguilar, F., Aguilar, M., Agüera, F., and Sánchez, J. (2006). “The accuracy of grid digital elevation models linearly constructed from scattered sample data.” Int. J. Geogr. Inf. Sci., 20(2), 169–192.
Casula, G., Mora, P., and Bianchi, M. G. (2010). “Detection of terrain morphologic features using GPS, TLS, and land surveys: ‘Tana della Volpe’ Blind Valley case study.” J. Surv. Eng., 132–138.
Gao, J. (1997). “Resolution and accuracy of terrain representation by grid DEMs at a micro-scale.” Int. J. Geogr. Inf. Sci., 11(2), 199–212.
Guth, P. L. (1999). “Contour line “ghosts” in USGS level 2 DEMs.” Photogramm. Eng. Remote Sensing, 65(3), 289–296.
Huang, Y. D. (2000). “Evaluation of information loss in digital elevation models with digital photogrammetric systems.” Photogramm. Rec., 16(95), 781–791.
Jet Propulsion Laboratory (JPL). (2003). “SRTM30 documentation.” California Institute of Technology, 〈http://dds.cr.usgs.gov/srtm/version2_1/SRTM30/srtm30_documentation.pdf〉 (Mar. 2, 2014).
Katzil, Y., and Doytsher, Y. (2000). “Height estimation methods for filling gaps in gridded DTM.” J. Surv. Eng., 145–162.
Maune, D., ed. (2007). Digital elevation model technologies and applications: The DEM user manual, American Society of Photogrammetry and Remote Sensing, Bethesda, MD.
Mukherjee, S., Joshi, P. K., Mukherjee, S., Ghosh, A., Garg, R. D., and Mukhopadhyay, A. (2013). “Evaluation of vertical accuracy of open source digital elevation model (DEM).” Int. J. Appl. Earth Obs. Geoinf., 21(Apr), 205–217.
Shan, J., Zaheer, M., and Hussain, E. (2003). “Study on accuracy of 1-degree DEM versus topographic complexity using GIS zonal analysis.” J. Surv. Eng., 85–89.
U.S. Naval Academy (USNA). (2013). “MicroDEM Help file.” 〈http://www.usna.edu/Users/oceano/pguth/website/microdem/microdemdown.htm〉 (Mar. 2, 2014).
USGS. (2012). “Global 30 arc-second elevation GTOPO30.” 〈https://lta.cr.usgs.gov/GTOPO30〉 (Mar. 2, 2014).
Wilson, J., and Gallant, J. (2000). Terrain analysis: Principles and applications, Wiley, New York.
Yanalak, M. (2003). “Effect of gridding method on digital terrain model profile data based on scattered data.” J. Comput. Civ. Eng., 58–67.
Zhilin, L. (1993). “Mathematical models of the accuracy of digital terrain model surfaces linearly constructed from square gridded data.” Photogramm. Rec., 14(82), 661–674.
Zhilin, L. (2006). “Variation of the accuracy of digital terrain models with sampling interval.” Photogramm. Rec., 14(79), 113–128.
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© 2014 American Society of Civil Engineers.
History
Received: Apr 9, 2013
Accepted: Dec 27, 2013
Published online: Jan 2, 2014
Discussion open until: Sep 4, 2014
Published in print: Nov 1, 2014
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