To be honest, the expectation is that you drive a car everywhere. The sidewalk network in this area is thrown together haphazardly and has very poor connectivity. As a resident and regular user of the sidewalks in this area, I believe it would be unwise to map this crossing.

Here's a bit from the crossing=unmarked page in the wiki:
"Some states have laws that establish an implied crossing on every side of every intersection by default[1] or wherever one is implied by a sidewalk flanking the intersection,[2] unless otherwise prohibited by a regulatory sign. This can technically result in very unsafe crossings that most people would not recognize as crossings, such as across a busy four-lane road without any pedestrian infrastructure. It would be reasonable to omit such crossings in favor of safer ones. "

I'll take a video of the "crossing" later and link you if you like.