Number: 11 User Lastname: Adam User Firstname: Nico User e-mail: [email protected] Affiliation: German Aerospace CenterGerman Remote Sensing Data Center User Address: German Aerospace CenterGerman Remote Sensing Data CenterOberpfaffenhofen User Telephone: +49 8153 281326 User Fax: +49 8153 281446 Theme: Topographic Mapping and Digital Elevation Models Special Requirements: User Type: Presenter (v...

Spaceborne Synthetic Aperture Radar (SAR) interferometry has been utilised to acquire high-resolution Digital Elevation Models (DEMs) with wide coverage, particularly for persistently cloud-covered regions where stereophotogrammetry is hard to apply. Since the discovery of sand buried drainage systems by the Shuttle Imaging Radar-A (SIR-A) L-band mission in 1982, radar images have been exploite...

The Shuttle Radar Topography Mission (SRTM) delivered a digital terrain model of better spatial resolution and accuracy than traditional free global DEM datasets at near-global coverage and made a wide range of detailed hydrologic applications feasible. In this study, the SRTM data is compared with the digitalized topographic contour DEM in hydrological analysis over the QingJiang catchment in ...

Digital elevation model (DEM) generation from stereo images is an effective and economical method in topography mapping. This paper used the stereo pair methodology to generate the digital elevation model (DEM) from PRISM (Panchromatic Remote-Sensing Instrument Satellite) sensor which is onboard of ALOS (Advanced Land Observing Satellite). The pair of forward-backward is used as stereoscopic im...

Topography is a crucial surface characteristic in soil erosion modeling. Soil erosion studies use a digital elevation model (DEM) to derive the topographical characteristics of a study area. Majority of the times, a DEM is incorporated into erosion models as a given parameter and it is not tested as extensively as are the parameters related to soil, land-use and climate. This study compares ero...

The principles of SAR interferometry and interferogram generation, in particular phase unwrapping and geocoding, are described. Current issues of SAR interferometry are discussed: atmospheric effects on spaceborne repeat-pass interferometry limiting the accuracy and reliability of Digital Elevation Models (DEM), the Shuttle Radar Topography Mission (SRTM) resulting in a globally homogeneous DEM...

The principles of SAR interferometry, in particular phase unwrapping and geocoding, are described. Interferometric point positioning is treated based on a least squares approach avoiding approximations. Current issues of SAR interferometry are discussed: atmospheric effects on spaceborne repeat-pass interferometry limiting the accuracy and reliability of Digital Elevation Models (DEM), the Shut...

The Shuttle Radar Topography Mission (SRTM) produced near-global 1 and 3 DEMs. The cartographically-derived National Elevation Dataset (NED) provides a mechanism to assess SRTM quality. We compared 12 geomorphometric parameters from SRTM to NED for about 500,000 sample areas over the continental United States. For basic parameters like average elevation or relief, the two data sets correlate ve...

The Shuttle Radar Topography Mission (SRTM) digital elevation model (DEM) is one of the most complete and frequently used global-scale DEM products in various applications. However, previous studies have shown that the SRTM DEM is systematically higher than the actual land surface in vegetated mountain areas. The objective of this study is to propose a procedure to calibrate the SRTM DEM over l...

In this study we evaluate whether the methodology of Boosted Regression Trees (BRT) suits for accurately predicting maximum wind speeds. As predictors a broad set of parameters derived from a Digital Elevation Model (DEM) acquired within the Shuttle Radar Topography Mission (SRTM) is used. The derived parameters describe the surface by means of quantities (e.g. slope, aspect) and quality (landf...