نتایج جستجو برای: aster gdem v2

تعداد نتایج: 11635  

Journal: :Remote Sensing 2014
Kim André Vanselow Cyrus Samimi

In many arid mountains, dwarf shrubs represent the most important fodder and firewood resources; therefore, they are intensely used. For the Eastern Pamirs (Tajikistan), they are assumed to be overused. However, empirical evidence on this issue is lacking. We aim to provide a method capable of mapping vegetation in this mountain desert. We used random forest models based on remote sensing data ...

Journal: :International journal of environment and geoinformatics 2022

Drainage basin/watershed analysis based on morphometric parameters has an essential role in watershed management and planning. Reliable delineation of watersheds drainage networks is critical for hydrological geomorphological studies. Since access to high-resolution digital elevation models (DEMs) surface (DSMs) costly, many researchers need evaluate low-resolution open-source products. Several...

Journal: :ISPRS Int. J. Geo-Information 2017
Daniel Becker María de Andrés-Herrero Christian Willmes Gerd-Christian Weniger Georg Bareth

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. ...

2013
Ka Ming CHUA Jie WU Jean-Claude THOURET Soo Chin LIEW

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...

Journal: :ISPRS Int. J. Geo-Information 2017
Tanja Kramm Dirk Hoffmeister Constanze Curdt Sedigheh Maleki Farhad Khormali Martin Kehl

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...

Journal: :Remote Sensing 2017
Philipp Rastner Tazio Strozzi Frank Paul

Monitoring glacier changes in remote Arctic regions are strongly facilitated by satellite data. This is especially true for the Russian Arctic where recently increased optical and SAR satellite imagery (Landsat 8 OLI, Sentinel 1/2), and digital elevation models (TanDEM-X, ArcticDEM) are becoming available. These datasets offer new possibilities to create high-quality glacier inventories. Here, ...

Journal: :E3S web of conferences 2021

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...

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