How much of “Uncharted” is actually charted?

Sony's big Uncharted movie with Tom Holland is in the works and causing a stir due to doubts of its game accuracy, but just how accurately named was the Naughty Dog series in the first place? Were the games ever really Uncharted... or were they secretly CHARTED this whole time? Wow, you opened the description! Thanks! Hey, why don't you ALSO open this link and follow me on twitter, what's one more click, eh?   / backseatgamedev