Earlier quoted context omitted.
What does "actually in control" mean? When the IRA set up a checkpoint in Rosslea, should that have moved the border on the map? When there are disputes over uninhabited islands, do you want it to show whoever visited first? Obviously these are small examples, but the same issues apply to full-scale civil wars. You'd also be essentially legitimising the right of conquest if as soon as country A invades country B you…
> You'd also be essentially legitimising the right of conquest Documenting reality doesn't endorse what happened. Istanbul was Constantinople. Shit happens. If I'm travelling, I'd much rather the flags and borders reflect the situation on the ground instead of making meaningless humanitarian gestures.
The issue is reality not being settled or agreed upon. For disputed territories there is effectively two realities both officially backed by sovereign countries.
You can come up with some arbitrary criteria to split the difference, but your reality would break when you effectively set foot in a spot that works under the competing assumption.