Are you storing the mapping of place to pubkey anywhere? If so, it might be able to be done with ZKProofs instead, right?
Regardless, this might also be useful for Onosendai’s cyberspace that is mapped to physical space npub1arkn0xxxll4llgy9qxkrncn3vc4l69s0dz8ef3zadykcwe7ax3dqrrh43w (npub1ark…h43w)