Wait, am I understanding this right? This guy made a map that was more accurate than the official one, then basically uploaded it for everyone (since a traffic map is not really something you want to keep for yourself), and then gripes about his more accurate version being thought of as the official one? Dude, you made a subway map. Chill. Had they used the official map, the city wouldn't have sued either. You made this for the public. Now it's even more public. It's not like Naughty Dog made a single dollar more just because they had an accurate subway map.
Edit: I mean, don't get me wrong, I understand he technically has the right to sue. But really? You made this for public consumption! So that people can use it to get around. Wouldn't you WANT it to be seen as THE map and used in other media?