STUDY OF ERROR ANALYSIS AND THE EFFECTS OF RESAMPLING ON DIFFERENT DEMS

Daisy Paul, Nagaveni Ch, Vani V, V. R Mandla, Tejpal Singh

Abstract: Resampling is the method of creating new pixels of different pixel size with respect to the original, using some interpolation technique from some existing pixels. Sometimes, the process may be as simple as duplication. Various approaches have been made to classify terrain based on the DEMs. To classify DEMs based on the slope into morphometric classes such as peak, ridges, pass, plane, channel & pits The main objective of the study is to compare the different morphometric results obtained for ASTER, SRTM 90 and SRTM 30 DEMs. The highlight is how the parameters from the resampled DEM appreciably agree with that of the original DEM of the same resolution, implying the importance of the resolution. In morphometric analysis, artifacts due to erroneous measurement techniques may be overlooked upon

Keywords: ASTER, SRTM, DEM, resampling, morphometric analysis

DOI: https://doi.org/10.15623/ijret.2015.0423014