I'd have to say some are more precise than others, the trick is figuring out which map to trust.

One thing that helped me when I was a noob was capturing the in game maps to a file, making the font (Courier or Courier New) just big enough that each map had it's own page, and printing them out. It was painful back then, because it was on a dot matrix printer.. but it worked for me. I found it tons easier to read them on paper, where I could manipulate and mark them up to my heart's content.

As far as I know, this isn't against the rules still.. so it's another option for you. Just don't publish them. =)

- Tharena