[nkrisc]

I can totally imagine the sales pitch to police departments: before you bust down the door of the local journalist who criticized you, look up their home floor plan and review 360 camera footage of each room, so you can get to their laptop before it locks when your surveillance team detects they’ve stepped away to use the bathroom.

[ifh-hn]

Ignoring the OTT scenario premise; if the surveillance team is able to detect movement like that then the surveillance team already knows where the laptop is. Why would you need a floor plan?

[nkrisc]

If you were just using something kind of remote sensing technology to determine where people were in the building, but you didn’t know the layout, you couldn’t be sure. I’ve seen examples of using WiFi or other radio frequencies to spatially locate people through walls, but it doesn’t let you actually see what’s there.

So if you combine their position in the building with separately collected layout information about the building, you can better infer their activity.

[ifh-hn]

Presumably the surveillance team, and all the police about to bust down the door, are at locus in person? They already know the floor plan, occupants present, and there locations. No need to infer anything because they're under surveillance...