As you know, Linux users have a lot of free time that needs something to do. One enthusiast spent a week of his life to draw a map of the Linux world.
Sorry for the spelling and phonetic errors in the text.
Owner and main writer of MintGuide.org is not a native English speaker.
Stumbled upon this map on the Internet.
The principle is simple, the more popular the distro, the more it takes place. Similar distributions are close to each other.