In this talk, the authors plan to take you on the development road of an initiative- community led and supported by ESA - to ingeniously map the complex and dynamic ecosystem of open source for geospatial solutions. Started in 2016 as a volunteer initiative to understand the connections and dependencies between geospatial foss by summarily documenting it in a spreadsheet, it continued with the development of a resources platform for geospatial data exploitation, that combined modern and efficiency in data collection and representation (no more spreadsheets! ), with a significantly more thorough project documentation process, as well as clear steps in the direction of community building. Having more than 300 FOSS projects documented, the team is taking the next big leap. Trying to figure out how to not only map but also extract significant quality metrics that could lead to a better, more robust understanding of the open source for geospatial ecosystem.