[HPFGU-Movie] Question about the map

[Miller, Gina (JIS)]

Amanda:
> Movie Fact: Lupin knows the map is a map and what it does.
> Movie Fact: Sirius also knows this, because he also (in the Shack) 
> talks about it as if he knows exactly what it is and what it does.
>
> Question within the movie parameters, then: Why did Lupin tell Harry 
> that keeping the map was bad, reason being that the map would provide 
> Black the means to get to Harry, when Black knew all the secret 
> passages and entrances it shows, already?


Gina:

Amanda, I think he meant because the map shows where people
are. Yes, he already knew about the passages, but with the map he would
always know where Harry was and what direction he was headed.
Does that help?