3 ms·

Someone actually did that to count parking lot usage: https://gigaom.com/2010/08/18/parking-lots-help-predict-earnings/ https://gigaom.com/2010/08/18/parking-l

• WillNotDownvote 12y ago
  I used to joke you could set up webcams watching the freight rail lines out of ports, count the train cars and types with computer vision software, and sell the data to hedge funds.
  • krschultz 12y ago
    Not a joke, people do that. They use satellites to measure stacks of containers, piles of coal, etc etc.