I've magnified the Mayfield Park area in the 1953 aerial photo. I noticed two things right away. First, the new M.R. Wood School was completed; in fact, it had opened just a month before this photo was taken. You'll see there's just the one big classroom building - no gym. Also notice how residential housing runs right up to the north perimeter of the Imperial refinery.
I've included the next photo taken in 1968 to highlight the big changes that were just a few years away. Notice the school complex is bigger, including a gym. Next, the houses nearest to the refinery were cleared for expansion. (Avenue A disappeared.) New housing had expanded into the north end of Mayfield Park.