نتایج جستجو برای: aster gdem
تعداد نتایج: 2798 فیلتر نتایج به سال:
The overall objective of this work is to apply GIS-based cost distance modeling (CDM) to site catchment modeling and analysis of prehistoric (Solutrean) sites in Andalusia. The implementation of a GIS-method for slope-based CDM was explained in detail, so that it can be replicated easily in future studies. Additional cost components, vegetation and stream networks, were included in the method. ...
Mount Merapi is one of the most active volcanoes in Indonesia, and its most recent massive eruption was in November 2010, causing great loss of lives and assets. Land movement of the volcano and the regions around were known to be significant. One of the methods that can be used to monitor such motion is Interferometric Synthetic Aperture Radar (InSAR). The Synthetic Aperture Radar (SAR) images...
An accurate geomorphometric description of the Iranian loess plateau landscape will further enhance our understanding of recent and past geomorphological processes in this strongly dissected landscape. Therefore, four different input datasets for four landform classification methods were used in order to derive the most accurate results in comparison to ground-truth data from a geomorphological...
In Morocco, the phenomena of water erosion cause significant economic losses mainly linked to silting up dams, degradation equipment and socio-economic infrastructures, loss soil productivity insecurity population. The SWAT (Soil Water Assessment Tool) model was used estimate quantities sediments generated by various erosive processes at level Ourika watershed. modeling, which is done with dail...
Flood hazard and risk analysis in developing countries is a difficult task due to the absence or scarce availability of flow data digital elevation models (DEMs) with necessary quality. Up eight DEMs (ALOS Palsar, Aster GDEM, Bare Earth DEM, SRTM Merit TanDEM-X NASA Copernicus DEM) different acquisition, spatial resolution, processing were used reconstruct January 2015 flood event. The systemat...
Fractional tree cover (Fcover) is an important biophysical variable for measuring forest degradation and characterizing land cover. Recently, atmospherically corrected Landsat data have become available, providing opportunities for high-resolution mapping of forest attributes at global-scale. However, topographic correction is a pre-processing step that remains to be addressed. While several me...
The Greenland Ice Sheet (GrIS) is known to have experienced widespread retreat over the last century. Information on outlet glacier dynamics, prior to this, are limited due to both a lack of observations and a paucity of mapped or mappable deglacial evidence which restricts our understanding of centennial to millennial timescale dynamics of the GrIS. Here we present glacial geomorphological map...
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