The training jointly organised by UN Mappers and Eurêka Géo from Cameroon took place from 26th March to 4th May 2021. This 12-hours online training aimed to strengthen the capabilities of the YouthMappers Chapters of Mbalmayo and Douala, Eurêka Géo students and the OpenStreetMap Cameroon community on OSM mapping using JOSM and iD Editor and data collection tools such as Kobo Collect; and to lay the foundations for a long and fruitful collaboration between Eurêka Géo and UN Mappers on future projects.