Good work! I like the way those symbols seem to naturally blend with the underlying map, that's something I've found to be lacking in most maps that use drawings for symbols.

Only problem I could notice are the map edges, specifically how some islands/landforms seem to get cut off in there. Adding a more obvious frame might solve this, or perhaps the landforms could be gradually faded toward the map edge? It's not a major fault but kind of annoying to see in an otherwise awesome map.