Accuracy of difference associated with grid digital elevation model

Chun Wang; Guoan Tang; Dunxin Jia; Yini Jia

doi:10.1117/12.763559

25 July 2007 Accuracy of difference associated with grid digital elevation model

Chun Wang, Guoan Tang, Dunxin Jia, Yini Jia

Proceedings Volume 6753, Geoinformatics 2007: Geospatial Information Science; 67532I (2007) https://doi.org/10.1117/12.763559
Event: Geoinformatics 2007, 2007, Nanjing, China

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.

Citation Download Citation

Chun Wang, Guoan Tang, Dunxin Jia, and Yini Jia "Accuracy of difference associated with grid digital elevation model", Proc. SPIE 6753, Geoinformatics 2007: Geospatial Information Science, 67532I (25 July 2007); https://doi.org/10.1117/12.763559

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