Yeah, I was about to post that it looked like some hybrid of a voronoi diagram and a treemap. More about those diagram types that can be combined in this manner

Yeah, I was about to post that it looked like some hybrid of a voronoi diagram and a treemap. More about those diagram types that can be combined in this manner: https://en.wikipedia.org/wiki/Voronoi_diagram https://en.wikipedia.org/wiki/Voronoi_diagram https://en.wikipedia.org/wiki/Treemapping https://en.wikipedia.org/wiki/Treemapping