s0meguy,

Very impressively textured! Might I suggest using a different color than that bright-midtone yellow where you've used it? It is rather jarring next to the smooth, pleasing earthtones of the topology/climatology. The plastic texture of the symbols seems somewhat cartoonish against such a well-developed backdrop, as well. I also think it would be helpful if a proper legend were provided.

Judging by the tonality difference between the water surrounding the archipelago and the larger ocean, you've given some attention to the bathymetry; how accurate is the deep-water bathymetry, or are those varying tones just the byproduct of the texturing process? If that is meant to be accurate bathymetry, then I'm curious what made you choose such a relatively uniform depth for the ocean floor.

I really like what you've done with this piece, so far, and hope my comments and questions are helpful!