Estimating crowd sizes tin post away live on a really controversial subject. For example Donald Trump claimed at that topographic point were a "million-and-a-half people" at his inauguration as well as said that the press were "going to pay a big price" for reporting figures agency below his practiced opinion.
One agency to gauge the size of a crowd is to role maps to calculate the surface surface area of a crowd as well as thence to multiply that surface surface area past times the estimated density of the crowd. MapChecking is a really elementary interactive map tool that tin post away create this for you. It allows you lot to depict the surface surface area of your crowd, demonstration, march or gathering on a Google Map. It thence allows you lot to come inwards an gauge for the give away of people per foursquare meter inwards your crowd. Once you lot convey entered those ii variables MapChecking automatically industrial plant out the crowd size.
Using a Reuters photo of Trump's inauguration alongside Map Checking gave me a figure of 357,143 people inwards the National Mall on Jan 20, 2017. If anything this mightiness live on beingness a flake generous equally I haven't allowed for what await to live on sizable gaps inwards the crowd inwards the Reuters photograph.
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