We have satellites which can see all corners of the globe, at quite high resolution. Enough to discern a QR Code that takes up all of each roof.

The QR can be fixed, or change with something like ePaper.

Each building can use smart home devices to store data around its contents:

• People who live there
• Visitors
• Food items
• Pets
• Energy usage
• Vitals like temperature

Each building can provide as much or as little data as they wish, however more gets rewarded, and regular updates get rewarded, and minimums are required if people are wanting to fully participate in society.

Data around people is non-identifiable. Age and gender, basically. But anything is possible.

Data is stored on local secure servers, the address of which come from the QR Code on the roof.

Satellites keep track of all the latest QR Codes and their geolocation.

Which means that we have a continuous census of Planet Earth. And the data is used in the same way as manual censuses every 5 or 10 years.