Puzzle 425: Tetra Firma 27

It's my traditional 31x45 puzzle which I do every 25 puzzles! Posting huge puzzles never gets old! Figuring out what to say about them, though, does. :[ As such, I will just link to this completely irrelevant XKCD comic (which happens to also be number 425). Enjoy the huge puzzle, everybody!
Rules of Tetra Firma
(click to enlarge)

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