[Tony M]

Is it a fictional stadium?

Even allowing for the foreshortening factor, the Left Foul and Right Foul Lines look incredibly short - I'd be surprised if they were anything more than 280 feet.

Using basic maths drawing a line from 3rd to 2nd will be 90 feet long and since it is perpendicular to the foul line in an aerial view, in perspective, taking that distance and marking up the left foul line will still be an extra 90 feet and that makes 180 feet just before the point where the foul ground has come in and is running close to the line. There's not much left after that, so maybe even 240 feet is pushing it.