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:D btw, if you find any country label to be missing or could be improved - right click it, change it, and then send a PR (it's two clicks away)

how exactly did you name and cluster these things? i love how you presented it and dont know of any existing quantitative methodology

Check this out https://github.com/anvaka/map-of-github#how-was-it-made - I gave a short overview there - does this help?