My brother brought home a stock of copied floppies back in the day. The had a number written in sharpie on them, that was it. I had a notebook with all sorts of notes and drawings. I think having that map might have ruined the experience a little for me.
If memory serves, the map just subtly highlighted stars where there was something more than mere resources to be found. It could be backstory, useful items, dangerous enemies, etc. The marking was so subtle that I didn't even notice it until my second playthrough, when I was deliberately trying to discover more stuff.
