[fellerts]

It could be that they mean "our API should accurately determine the country and state given arbitrary lat/lon coordinates with 6 decimals of precision", which sounds fair to me. With 6 digits, you are looking at centimeter/inch precision. I agree that the wording does sound off though.

[richardwhiuk]

That just means the question is "why do you need 6dp of precision?" which boils down to the same question.