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Proceedings Paper

Accuracy of difference associated with grid digital elevation model
Author(s): Chun Wang; Guoan Tang; Dunxin Jia; Yini Jia
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Paper Abstract

Difference is the key method for deriving topographic parameters from grid digital elevation model (DEM). Its accuracy is the vital factor affecting the accuracy of topographic parameters. The research validated that the accuracy of difference is associated with topographic surface complexity, difference algorithm, DEM data accuracy and DEM data property including grid orientation, grid size, grid origin and data precision. The high accuracy results of difference could not derived from small grid size DEM if there are DEM data errors. There is one and only suitability DEM grid size which the difference calculation has the least RMSE (root mean square error). The research further perfects the theory and method of accuracy analysis in digital terrain analysis.

Paper Details

Date Published: 25 July 2007
PDF: 13 pages
Proc. SPIE 6753, Geoinformatics 2007: Geospatial Information Science, 67532I (25 July 2007); doi: 10.1117/12.763559
Show Author Affiliations
Chun Wang, Nanjing Normal Univ. (China)
Guoan Tang, Nanjing Normal Univ. (China)
Dunxin Jia, Nanjing Normal Univ. (China)
Yini Jia, Nanjing Normal Univ. (China)


Published in SPIE Proceedings Vol. 6753:
Geoinformatics 2007: Geospatial Information Science

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