Impact of spatial resolution, interpolation and filtering algorithms on DEM accuracy for geomorphometric research: a case study from Sahel-Doukkala, Morocco

Abstract

Nowadays, digital elevation models (DEMs), with their simple data structure and widespread availability, became the main source for representing Earth’s surface and have been an integral part of any geospatial analysis, in particular, geomorphometric research. Spaceborne photogrammetry remains an important technique for obtaining high-resolution elevation data, especially over large or/and inaccessible areas. However, DEMs acquired directly through remote sensing based instruments; such as photogrammetric DEMs, are prone to a severe amount of uncertainty. The aim of this research is to provide a relatively comprehensive understanding of high-resolution Spaceborne photogrammetric DEM generati..