[Haliken]

The zonerect is largely determined through a guess and check procedure. Based on where your loc indicator is on the map, compared to where it should be, I can change the numbers to correct the disparity. There is no easy equation to generate the zonerect accurately.

Quib

P.S. - You'd be taking pictures of your map, not the wall. Just a clarification.

P.P.S. - Fixed the transparency issue. Get the attached file.