Huh?
View attachment 21349
I'm saying he probably parked where the blue rectangle is located. He then went along the magenta path while talking to the dispatcher, and realized he lost Martin when he came to the perpendicular pathway. Since he believes Martin is going towards the back entrance, it would make sense that he would continue alone the same magenta pathway so he will have roughly the viewpoint notated by the yellow triangle. He would be able to see if Martin was running towards the back entrance, or off to another house... If he ran to another house, Zimmerman would be able to tell police approximately where he went - this may be the confusion about Zimmerman saying he was trying to get an address.
It was somewhere towards the end of this magenta pathway that I believe he was told to stop following Martin, and he did. He turned around and headed back towards his vehicle. This is a very reasonable distance to cover in that short amount of time, and I feel the scenario fits in well with the timeline.