Mathematics - The big picture

Here is one map of mathematics that's been getting some attention lately:

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At one point, I got frustrated with always lacking the math to understand the things I read about and made a cheeky poster expressing my frustration. With that format, I tried my best to cluster more related topics together.

(I could add that thinking about the possible hierarchy made me ask this question. Later I started an online notebook, working out that structure myself, and a couple of math concepts -not subjects- can be viewed on this graph.)

My question on how to put the topics in disk form became a populat question on Mathematics.SE.

For an incomprihensble big picture, essentially unordered, there is a list of "all" math subjects here.

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Mathematics - Form and Function by Saunders Mac Lane is a great book which tries to give some kind of "big picture".

As a bonus, some of the chapters also contain "map-like" sketches of various areas of mathematics (IIRC), but that's not why I'm recommending the book.

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