This lecture focuses on thematic mapping and graphic semiology, emphasizing practical aspects of creating statistical thematic maps. The instructor discusses the necessary concepts for implementing statistical thematic mapping, including the types of thematic maps and methods for classifying statistical information. Key topics include spatial units, spatial distribution, and the importance of data attributes in representation. The lecture covers the process of simplification, classification, and representation of data, highlighting the significance of choosing appropriate methods based on dataset characteristics. The instructor explains the distinction between qualitative and quantitative variables, detailing how to represent these variables effectively on maps. The lecture also addresses the challenges of visualizing data distributions and the importance of maintaining clarity in map design. By the end of the session, participants will be equipped to select suitable classification methods and create accurate statistical thematic maps, enhancing their understanding of spatial data representation.