Never mind. Your map was helpful. It has Fawcett City somewhere near Gary Indiana on Lake Michigan. This map though,
mentions Leesburg Virginia which would be a few short miles to the northwest of Elmond. The city I think it meant it was trying to say was Lynchburg. Something about it just didn't seem right.
I think the DCU Atlas book for the DC Heroes role playing game was partly based on the comics and partly on the game maker's best guess. It's not necessary the official DC truth on the subject. It's an attempt to make a decision that was the standard for all DC Heroes Game masters to use for the official rules. For instance...
That way if your hero, say Shrink-Wrap-Man lives in Fawcett City according to his character sheet, than the GM knows he can make the storyline proceed so Shrink-Wrap-Man can, in a short trip,ride his Supercycle to team up with Moonwalk-Girl (an NPC) from Gary, Indiana .
Its just a practical game for gameplay. It's subject to change at the
GM's discretion.
I have heard a few different cities that Capt. Marvel is supposed to be from and where they are.