INSTITUTO ARGENTINO DE NIVOLOGIA, GLACIOLOGIA Y CIENCIAS AMBIENTALES
Unidad Ejecutora - UE
capítulos de libros
Analysis and improvement of surface representativeness of high resolution Pléiades DEMs Examples from glaciers and rock glaciers in two areas of the Andes
RUIZ, L.; BODIN, X.
Geomorphometry for Geosciences
Bogucki Wydawnictwo Naukowe, Adam Mickiewicz University in Poznań - Institute of Geoecology and Geoinformation
Lugar: Poznan; Año: 2015; p. 223 - 226
Highspatial resolution Digital Elevation Models (DEMs) are fundamental datasets tounderstand the dynamics of Earth surface, such as recent change of thecryosphere, and especially in remote mountainous areas, like the Andes. Here wedescribe a methodological framework to improve the quality in terms of representativenessof terrain surface for high spatial resolution stereoscopic DEM obtained fromPléiades images. Using as example two DEMs from highly different regions fromthe Andes, we analyzed the different types of errors present in both DEMs. In orderto improve the output DEM a post-processing scheme was designed, followingthose steps: (1) filling the gaps with a spline interpolation method; (2)elimination of the granular noise with a multidirectional Lee filter; and (3)elimination of the spikes with a slope-based DTM filter. Besides improving therepresentativeness of both DEMs in terms of terrain feature, thepost-processing also improves the accuracy of DEMs in terms of absoluteaccuracy of elevations.