The stromatolites on Gleba, source of the iron and copper bacteria, are already on the map with their own color. Granted, you don't know if it's iron or copper until you get there. You also don't know if the "trees" are jellystem or yumako tree until you get there either.
All the volcanic rocks on Vulcanus yield the same thing, just more or less based on size, and they are already on the map as well.
Seems that the only thing the map doesn't help with is which rocks on Nauvis are worth the trip. Everything else, everywhere else, is on the map already.
The mod's perfect. Put a fork in it and turn off the oven.