The history is a little off in the above link -- it is the only reference I have read of multiple cameras being used for this project. Not likely. Though it would be quite the sight to see 13 mammoth plate cameras on a rooftop!
Thanks all, appreciate the kind words...
For a frame of reference, the top right plate was shot at 9am (camera was being stared right in the eye by the sun) and the bottom left plate was shot at 2pm-ish, outta the wash around 240pm. I even had a 15min visit from a Texas State Trooper between plates 9 and 10, because apparently my 8x10 camera up atop a parking garage caught the eye of a surveillance camera from a couple blocks away.
It felt a little too Orwellian for my tastes, but the trooper was quite nice and I have no outstanding warrants.