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Comparison of DEMs Spatial Resolution for Geomorphological Study in a Small Volcanic Island of Tidore, North Maluku, Indonesia

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Mutaqin, Bachtiar | Marfai, Muh Aris | Hadmoko, Danang Sri | Wijayanti, Helvetia | Lavigne, Franck | Faral, Audrey

Edité par CCSD ; Journal of Hunan University Natural Sciences -

International audience. This article intends to examine the Digital Elevation Model (DEM) spatial resolution's effect in generating morphological information, i.e., slope, aspect, and curvature, in Tidore, a small volcanic island in the eastern part of Indonesia. We used a 1:50,000 scale of Indonesian topographic maps to generate the first DEM and the second DEM from a national DEM of Indonesia, which have a 0.27-arcsecond spatial resolution. Descriptive and statistical analysis has been used to compare both DEMs for each parameter. The results show that high-resolution DEM can better identify the morphological parameters in a small volcanic island of Tidore. However, not all parameters have a positive correlation with the DEM's. For example, slope and curvature positively connect with DEMs, while a negative value connects aspect or slope direction with the DEM.

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