In real life you your map would be square shaped right?

Now look at Read Dead Redemption's http://faqsmedia.ign.com/faqs/image/article/109/1091366/red_dead_redemption_blank.jpg

So there you have it :mellow:

P.S. Don't sweat you will be exploring new regions/areas via DLC :goodjob:

http://www.gamesas.com/index.php?/topic/1132344-lack-of-used-space-in-the-game-startling/. Thanks.