No. There's really no point. The radar is there for finding your opponents in immediate territory. A Map would serve no such purpose. It just doesn't make any sense to replace that pivotal part of Halo. Having it accompany the radar somewhere else on the screen would just be clutter that I wouldn't prefer looking at.
Now, I wouldn't mind a map that you can pull up in the middle of a game for reference on where types of weapons are spawned at. If you ever played Gears of War 3 MP, and just started a game, it shows this type of map.