No...i'm sorry, i dont like the idea.
The whole map should be like the small local map where you uncover where you travel,if you ain't been to that area it should be blacked out.
Also there should'nt be a marker telling you where to go either in my opinion,would be better if the quest giver etc said the general direction,leaving more room for exploration,or as styles said getting lost......I also like styles idea about having to download maps from terminals etc,would work well for indoor/underground areas too.
Just my thoughts

Waiting for this game is busting my balls :ahhh: