Your first four points basically describe lat/lon. But it is hard for humans to parse long characters/numbers. And it's even more difficult to speak random char

Your first four points basically describe lat/lon. But it is hard for humans to parse long characters/numbers. And it's even more difficult to speak random characters. E.g. "B" "b" "be" "bee" are all spoken the same. That's why we use something like the NATO Phonetic Alphabet.