MAPPING AND MONITORING OF WETLANDS IN THE LAKE CHAD BASINUSING ENVISAT ASAR WIDE SWATH AND ENVISAT ASAR ALTERNATINGPOLARIZATION DATA (AO ID 467)

摘要

ENVISAT ASAR data is used for mapping andrnmonitoring wetland vegetation in Lake Chad Basin,rnAfrica. For mapping large areas at a coarsernresolution, a fusion method based on the waveletrntransform is used to combine ENVISAT ASARrnWide Swath data and SPOT-VEGETATIONrnoptical data. For more detailed mapping, ENVISATrnASAR Alternating Polarization images are used.rnFirst, segmentation is performed. Next, a regionbasedrnclassification is performed. The result isrncompared to a pixel-based classification.