I clicked expecting a well thought out strategy for organizing concept maps on a large scale but instead this is some individuals idea on how best to organize their own thoughts. In fact, not once in the entire document is the term "concept map" even used which makes me think that this person has spent zero time researching established techniques on the subject.
Concept maps are great. I've used them in the past and wish I could get in the habit of maintaining them more often. If you're interested in capturing and organizing your own thoughts, I'd highly recommend you look into concept maps. This on the other hand, I'm not sure what this is and I certainly wouldn't recommend you follow it.