What would be the point of going much more high tech than what's already commercially available? You can buy commercial satellite footage at a native resolution of 25cm, optionally upscaled to 15cm, for $20/km^2. [1] A bit of processing and you could certainly do high precision geographic mapping. In either case that's already enough to track individual people from space.

I suppose even higher and you could start resolving things like license plate numbers from space, but it just seems like sharply diminishing returns in general.

[1] - https://xrtechgroup.com/who-has-the-highest-resolution-satel...