Characterization of ASTER GDEM elevation data over vegetated area compared with lidar data Wenjian Ni, Guoqing Sun & Kenneth J. Ranson a State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China b Department of Geographical sciences, University of Maryland, College Park, MD, USA c Biospheric Sciences Branch, NASA's...

The DEM is often required for flooding or drainage modeling, land use studies, and geological other applications. A variety of DEMs, such as the Advanced Space Thermal Emission Radiometer (ASTER GDEM) Radar Topography Mission (SRTM) are currently available to public free charge. However, these DEMs remain a representation reality, which requires, before any application, their evaluation using h...

This study attempts to investigate the relationship between accuracy of different Digital Elevation Model (DEM) and fractal dimension D solve problem determining optimal catchment area threshold in plain watersheds. In this study, dimensions Shuttle Radar Topographic Survey (SRTM) V4.1 DEM, Hydrology 1K (HYDRO1K) Advanced Spaceborne Thermal Emission Reflection Radiometer Global (ASTER GDEM) wit...

Currently available high-resolution digital elevation model (DEM) is not particularly useful to geologists for understanding the long-term changes in fluvial landforms induced by tectonic uplift, although DEMs that are generated from satellite stereo images such as ZiYuan-3 (ZY3) include characteristics with significant coverage and rapid acquisition. Since an ongoing analysis of systems lackin...

A landslide susceptibility assessment for the Three Gorges (TG) region (China) was performed in a Geographical Information System (GIS) environment and Persistent Scatterer (PS) InSAR derived displacements were used for validation purposes. Badong County of TG was chosen as case study field. Landslide parameters were derived from two datasets. The Advanced Spaceborne Thermal Emission and Reflec...