To be honest. . . it looks like a bunch of filters. It gives the basic idea of there being land there, but I don't see how it would be useful to anyone trying to navigate by it.
I personally prefer a more literalistic approach though. If you put some borders and labels and outlines this could very well pass the sniff test, but right now I just see colors.
Look forward to your next attempt though! I encourage and appreciate your out-of-the-box thinking here, it just doesn't much appeal to me.