Overarching goal of this paper was to evaluate automated and semi-automated methods of mapping wetlands using Landsat ETM+ and SRTM data. Automated methods consisted of: (a) slope derived from SRTM, (b) Tasseled cap Wetness Index (TCWI), (c) Normalized Difference Water Index (NDWI), (d) multi-band vegetation indices (MBVIs), (e) two band vegetation indices (TBVIs), (f) normalized difference veg...

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...

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...

The objective of this study is to generate a flood hazard map based on geomorphologic approach employing Shuttle Radar Topographic Mission (SRTM) DEM and satellite image data (ASTER and LANDSAT). Supervised classification of satellite images is implemented to characterize land cover types. Moreover, the Modified Normalized Difference Water Index (MNDWI) is undertaken to identify moist surface o...

In spaceborne dual-antenna (i.e., single-pass mode) interferometric synthetic aperture radar (InSAR) system, the alignment of the master and slave antenna beam is crucial. In order to achieve the best interferometric performance, antenna beams should be coincided with each other between the master and slave. The beam alignment of the first spaceborne dual-antenna InSAR system, the Shuttle Radar...

Elevation information is an important component of any geospatial database. It is imperative for applications such as topographic mapping, spatial and temporal change detection, feature extraction and visualisation. Although elevation data may in cases be purchasable from government agencies, the availability of alternative sources of data, such as space imagery, coupled with increased user con...

This paper evaluates the quality of SRTM3 data for alpine and plateau areas in Northwestern (NW) China against DEM data extracted from topographic maps. These SRTM data were obtained from both the ESRI ArcGIS 9.2 software package and NASA's Jet Propulsion Laboratory website. It shows that these two data sources provide the approximate precision as the DEM based on 1:250000 scale topographic map...

PU (phase unwrapping) is the key step and important problem in DEM (digital elevation model) extraction and the measurement of surface deformation of InSAR (Interferometric synthetic aperture radar). The CKFPUA (conventional Kalman filter phase unwrapping algorithm) can obtain reliable results in the flat terrain areas, but it caused error transmission not making the accurate inversion of surfa...

High resolution stereo satellite imagery is well suited for the creation of digital surface models (DSM). In this paper, a system for highly automated DSM and orthoimage generation based on CARTOSAT-1 imagery is presented. The proposed system processes photometrically corrected level-1 stereo scenes using the rational polynomial coefficients (RPC) universal sensor model. The RPC are derived fro...