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The optimal use of optical and radar images is a major topic of interest in remote sensing. The main objective of this study is to explore the potential of optical-radar fusion for lithostructural mapping of the Precambrian basement of West Africa. The spatial resolution of the Radarsat band (50 m) is refined to 15 m by wavelet fusion with the panchromatic channel, before multi-resolution analysis and wavelet fusion with Landsat 7 bands ETM+ 1-5 and 7. The result is a multispectral optical-radar image of simulated high spatial resolution (OR). The visual interpretation of products derived from specific thematic processing applied to the images has enabled us to draw up a lithostructural sketch of the Precambrian basement. This highlights the major geological units, corridors and faults characteristic of the main fracturing directions in the region.
About the author
Dr KOUAME Koffi is a lecturer at the UFR STRM of the Université F. Houphouët-Boigny d'Abidjan. A specialist in remote sensing and GIS, he is in charge of the "Image and data fusion" and "Impact of climate change" courses at CURAT/EDAT. He has over 10 years' experience in project/program planning, monitoring and evaluation.
