The aim of the work was to produce a geological and structural map of the Ouaddai massif using landsat and radar data. We used landsat-8 images to extract the lithological map (colour composition and ratio bands) and PALSAR DEM radar to extract the lineament map (using different filters). For the radar sensor, a total of 2188 lineaments were detected and extracted, with two main rock fracturing directions (ESE-WNW (90° to 115°) and NE-SW (45° to 65°)). For the landsat-8 sensor, a total of 987 lineaments were extracted, with two main lineament directions (NE-SW or N45° to 65° and ENE-WSW or 115° to 135°). Field observation revealed that the geological bedrock in the eastern part of the Ouaddaï massif is mainly granitic. The NE-SW and SE-NW directions are the main fracturing directions in these geological formations.
