In this study, we present a semi-automatic procedure using Neural Networks— Self Organizing Map—and Shuttle Radar Topography Mission DEMs to characterize morphometric features of the landscape in the Man and Biosphere Reserve “Eastern Carpathians”. We investigate specially the effect of two resolutions, SIR-C with 3 arc seconds and X-SAR with 1 arc second for morphometric feature identification...

Pada era teknologi yang berkembang pesat sekarang ini, metode digunakan untuk menganalisis daerah aliran sungai (DAS) semakin sesuai perkembangan teknologi. Salah satu bukti DAS yakni dengan memanfaatkan SIG ( Sistem Informasi Geografi ) sehingga analisis dari pengolahan data spasial dapat dilakukan lebih mudah, efisien, dan ekonomis. satunya morfometri di mana menurut (Supangat, 2012) sendiri ...

OF SRTM-based morphotectonic analysis of the Poc-os de Caldas Alkaline Massif, southeastern Brazil Carlos Henrique Grohmann , Claudio Riccomini, Fernando Machado Alves Programa de Pós-Graduacão em Geoquı́mica e Geotectônica, Instituto de Geociências, Universidade de São Paulo, Rua do Lago, 562, 05508080 SP, Brazil Departamento de Geologia Sedimentar e Ambiental, Instituto de Geociências, Univers...

Supplementary data Data processing 1. Topographic data Because the SRTM data are not continuous, we filled minor holes of a few pixels by interpolation and filled larger holes with 90-m elevation-adjusted Digital Terrain Elevation Data (DTED). For the remaining regions with missing topographic information, we used digital elevation models (DEMs) created from stereo-views of the Advanced Spacebo...

Nowadays the free-access digital elevation models are getting more and more popular. The SRTM and ASTER GDEM databases are the most widespread. However, there are numerous situations and weaknesses we have to take into account during their usage, such as the direction-dependent accuracy and the difference between the digital and the real surfaces. Our goal was to examine these kinds of deficien...

Abstract. Accurate estimates of regional ice thickness, which are generally produced by ice-thickness inversion models, crucial for assessments available freshwater resources and sea level rise. A digital elevation model (DEM) derived from surface topography glaciers is a primary data source such models. However, the scarce in situ measurements glacier limit evaluation DEM uncertainty. Hence in...