Nope, the shading on the map (deeper than about 2,500 feet) just shows a rough contour of the seafloor. It's not always spot on, but it works. When the floor gets shallower than about 2,500 feet, it switches to a much more accurate contour map.
Shift+I toggles the ice display on your nav map. Shift+I once shows the ice based on percentages (10% is one shade, 20% another, etc.). Shift+I twice shows, or seems to show, the individual chunks of pack ice, which can be useful for navigating your FFG. Head up to the arctic during February or the antarctic during August to see for yourself.
