> more of the land is closer to you and therefore easier to read.

As most people age, that gets less true. The optimum placement ends up being around an arms length away, so being away from the edge could help.

But if you're showing the whole world, typically the details aren't that important, so it's mostly arbitrary.

Haha, don’t read into my random example too hard, it was only there to prove you can make an argument for anything if you try hard enough.