. "4.05333139267584E7" . . "Mt. Vernon" . "22.55" . "Mount Vernon, Maryland" . "2.1336" . . "22.55608810204969" . . . "6785768.84908032" . . . "6790000.0" . "−5" . "Mount Vernon" . "−4" . . "Mount Vernon, Maryland" . . . . . . "3.374754507767808E7" . "761" . . . . "3.374E7" . . "2.0" . "4.053E7" . .