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This lecture introduces the practical use of QGIS for managing geographical information, focusing on collaborative tools like OpenStreetMap. The instructor demonstrates how to work with spatial data, analyze proximity, and create visualizations, emphasizing the importance of spatial analysis in various fields, including the impact of the pandemic. The session covers georeferencing historical maps, manipulating vector data, and using plugins for data management and visualization. Participants learn how to overlay historical maps onto current ones, identify homologous points, and perform georeferencing to align old maps with modern ones.