Well, it's pretty much that the center of the map as it stands right now is 0,0. Also, the tropics are at those degrees on Earth because of the Earth's tilt, yeah? And I'll assume that all these patterns would be shifted if the tilt were changed (which would most likely be the case since what are the odds two separate planets have the same axial tilt haha). Most likely it would be tilted more which would explain the general increase in temperature perhaps? I'm thinking of tropics at around the 35 or 40 degree mark. a How much do you think that would affect?

Also, there is no land in the arctic region, only the antarctic. (How can I make this obvious on the map?)

Also also that flash thing is super helpful! Also the info on mountains and rain shadows. I'll look more into these and shape my map's vegetation patterns accordingly. Thanks! +Rep for you for all this. :B