I was trying to figure out how people really colorize satellite pictures, but wasn’t making any headway, so I just went ahead and did some relatively straightforward gimp work. I’ll write this up too, eventually. Basically it is just a set of thresholds to establish some masks (one for the ocean, one for brown land, one for green, and one for the clouds. Less green would probably be better than more, because it begins to leak into the clouds. Oh well.