From the images, the space the protesters were gathered appear to be of the same scale as Times Square. I was there for New Years 1999. So were 2 million other people. The crowd stretched from 43rd Street (where the ball is) to just north of 59th Street (at the south end of Central Park). They lined two avenues (Broadway and 7th Ave). In NYC, it's 20 streets/mile, so that was 0.8 miles along two avenues...