Fascinating piece, recall using data from 'discovered' cameras to determine city walking traffic patterns. Also using data from public cameras, with scrubbed facial images, could be acquired for similar analysis. Today with a increased attention to privacy, much of this data would have to be further scrubbed of signs of identity. Still very useful patterns of usage and behavior of people over time in the pandemic could be derived. Note the use of 120K cameras here to generate data worldwide.
How Have People Have Responded to Covid-19 Restrictions Around the World?
Purdue University News
By Kayla Wiles
Purdue University engineers have built a website that pools live public videos and images from about 30,000 network cameras in more than 100 countries, to make it easier to analyze responses to Covid-19 restriction policies. The system automatically discovers cameras in public spaces, then an algorithm saves image data and downloads videos every 10 minutes or so, to be sent to cloud data centers for processing. The discovered cameras are part of a system called the Continuous Analysis of Many CAMeras, which taps roughly 120,000 cameras worldwide. The data also is helping to construct models for human interactions and disease proliferation. ... '
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