I have read about this system before, first in a science fiction novel surprisingly enough. When set up as a square with each temperament in a corner it provides at least a general idea of the variations between personalities. I recall referencing it before in a thread here on WP some time ago when someone asked if there was a "spectrum of NT"; I feel this topology might be close to accurate, though it is certainly not perfect
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Opportunities multiply as they are seized. -Sun Tzu
Nature creates few men brave, industry and training makes many -Machiavelli
You can safely assume that you've created God in your own image when it turns out that God hates all the same people you do