Yeah, I'm only talking about the distance from the core. Like you say, how the map is oriented doesn't matter.That position is rather subjective. We are on the outer 1/3 of your galaxy but as to being on the left side we'll only because that is convention. You could just as easily put our star on the right side.
Would be really nice if there was some kind of option that allowed you to pick preferred spawning distance from the core for your home system, though I can see how this might be difficult to implement.