Question

device used to see overhead crowd​

Answer 1

Answer:

I think periscope

Explanation:

Not sure about the answer

Answer 2

HERE IS YOUR ANSWER-

Crowd counting or crowd estimating is a technique used to count or estimate the number of people in a crowd.

The most direct method is to actually count each person in the crowd. For example, turnstiles are often used to precisely count the number of people entering an event. [1]

At events in streets or a park rather than an enclosed venue, crowd counting is more difficult and less precise. For many events, especially political rallies or protests, the number of people in a crowd carries political significance and count results are controversial. For example, the global protests against the Iraq war had many protests with widely differing counts offered by organizers on one side and the police on the other side. Another memorable incident occurred when Louis Farrakhan threatened to sue the Washington, D.C. Park Police for announcing that only 400,000 people attended the 1995 Million Man March he organized. The National Park Police still estimates crowd size for its own planning purposes, but does not publicly reveal the figures.[2]

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