Counting Crowds

The video discusses the challenges and methods of estimating large crowds, using Barack Obama's inauguration as a case study. It highlights the use of aerial photography and satellite images to divide the scene into regions, calculate their size, and assign density ratings. These methods help estimate the crowd size, which was around 1.8 million people, though estimates varied. The video concludes by noting that while estimates are useful, they are rarely exact.

What new insight or understanding did you gain from this video?