Wow!!! This is impressive! This is a truly inspiring map you're working on! I like the lines, the contours.

Black and white maps are always hard for me, because I have a hard time distinguishing between land and water. Are you possibly planning on adding textures so it's less confusing? Or perhaps you are planning on coloring this map? Some of the shading is a little too dark for me... but that's just my personal opinion. I tend to have a problem with high contrasts... it does wonky stuff to my eyesight