Accompanying article [fr] https://bonpote.com/la-carte-des-pensees-ecologiques/
Sorry this is in French but I think many movements have a similar enough name that English speakers will understand what “écosocialisme” or “écologies anti-industrielles” means. A note though: “libertaire” is not “libertarian” it is closer to “liberal” with a stronger left-wing bias.
I found it interesting because while they mention that it is extremely hard to make such a map and that it has tons of very debatable links and placement, I still see solarpunks being all over the left 2/3 of the map.
So, “libertaire” probably means “libertarian” in the original sense of an anarchist.
My feeling is that it is a label for anarcho-communists who got tired of explaining their relationships (or lack thereof) with marxist communism. Also used by “communistes libertaires” to emphasize they reject the authoritarian regimes that called themselves communist.