just a thought:
maybe these massive power outages are a form of mapping where the secret dumbs are, because in case of a power shortage, they rely on their own emergency energy systems.
you map a city from above, it looks like a christmas tree. but you take out the power it all goes dark, except for like hospitals or secret bunkers with power. suddenly the needle in they heystack starts glowing. and you can divert your troops accordingly.
I know. Problem is, that they get so much normally, that they cant tell what is what. To see the autark networks, they have to take out the 99% relying on the civil grid.
this interlocks with ancient space travel theories but might be a slide. see also Erich v. Däniken (german author about theories like ancient buildings like the pyramids having been build either by aliens or by humans to attract aliens again)
elite underground vault mapping?
Pizza slice being a symbol for the Sextant? The sextant and the pizza slice both representing the keystone of the arch?
could be an in-camera-reflection of a light source somewhere else in the uncut picture.