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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Hoja, D. Lehner, S. Niedermeier, A. Romaneessen, E. |
| Copyright Year | 2000 |
| Description | Author affiliation: German Aerosp. Center, Wessling, Germany (Hoja, D.) |
| Abstract | Coastal regions like the intertidal area of the German Bight are continuously changing their topography due to morphodynamic processes. This fact has serious impact on the German waterways, requiring a huge amount of dragging with costs of about 8/spl times/10/sup 7/ DM per year. To investigate these morphodynamics and to reduce the costs, an up to date digital elevation model (DEM) is needed. The DEM currently used is determined by conventional vessel-mounted echo sounder measurements, which is difficult and expensive to update, especially in very shallow areas that are navigable only during extreme tides. In order to monitor morphodynamic changes and to continuously update the changes in the bottom topography, shoreline information extracted from synthetic aperture radar (SAR) images of the European remote sensing satellites (ERS-1/2) at different tidal levels are interpolated into a DEM. Therefore, the shorelines are extracted with a new developed method using a combination of wavelet and active contours. The corresponding height information is interpolated from tide gauge data. In a final step, from this height information a DEM is generated using a weighted mean interpolation in space and time. For validation purpose, the extracted shorelines and the interpolated DEM are compared to an independent. Generated DEM based on airborne crosstrack interferometric SAR images as well as on ground truth measurements. In total some 100 ERS SAR scenes from 1992 to 2000 are used to identify morphodynamical active areas in the German Bight. |
| Starting Page | 1889 |
| Ending Page | 1891 |
| File Size | 574626 |
| Page Count | 3 |
| File Format | |
| ISBN | 0780363590 |
| DOI | 10.1109/IGARSS.2000.858157 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2000-07-24 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Data mining Surfaces Costs Tides Remote monitoring Sea measurements Delta modulation Digital elevation models Area measurement Current measurement |
| Content Type | Text |
| Resource Type | Article |
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