cheap map exploit in EU III (IN).

I have tweaked my message settings so that each time someone annexes someone game pauses and message appears so i can check if any good advisors are available.
This one last time when message popped up that Korea has annexed some Asian minor I accidentally clicked "go to" and all of a sudden I got all map knowledge the Koreans had - Asia, Japan, India and so on it all was revealed for my France who's biggest geographical discovery was Cape of Good Hope.