The Pouni region of Burkina Faso is characterised by its Palaeo-Proterozoic formations and Birimian terrains. In contemporary geological studies, the integration of advanced technologies is becoming crucial to improving the accuracy and efficiency of mapping. This article presents an analysis of the Pouni area using remote sensing and Geographic Information Systems (GIS) to produce detailed maps of lithological formations. The study is based on satellite data from the Landsat 5 programme, as well as geological and topographical data. Image processing methods such as colour composition (bands TM7, TM4, TM2) and Principal Component Analysis (PCA) were used to highlight lithological contours and identify distinct geological formations. In addition, the digitisation of lineaments, enhanced by directional filters such as Sobel's, provided a clearer understanding of the geological structures. The results obtained indicate that the integration of satellite data and GIS significantly improves the accuracy of geological mapping, offering significant savings in terms of time and resources. However, field validation remains essential to confirm these results and refine interpretations.

Remote sensing, GIS, lithological mapping, Pouni, Burkina Faso