So...

I've noticed that it seems pretty common place to mix top-down and more of an angled (bird's eye?) view of a map. I was wondering what sort of rules might be associated with doing things like this as the project I've been working on looks a little odd in that regard. What started out as a top down sort of look shifted into a more of a slant and now that I have my coastlines established it seems a little hard to fix it. I personally felt that it was part of the map's charm to mix the perceptions. But much like present and past tense (like I always seem to mix up anyway) are there rules against it? Does it even matter?

Thanks everyone,
Brittney