personally i find in-game map mostly unusable. It looks like many stars and lights in a confusing manner. And, Dotlan is way better. CCP, stop wasting your time. Payoff the guy who made Dotlan and use his superior form, please.
The only good thing about in-game maps is that you can see pod kills, and jumps on gate, but that info can be transferred to a much simpler format like Dotlan has.