In the CACM: An approach that has been used to design retail environments.
" ... Baidu's Big Data Lab has devised an algorithm that can predict crowd formation, which researchers say could be used to help warn authorities and individuals of unusually large crowds that threaten public safety.
The algorithm correlates data from Baidu Map route searches with the crowd density of the places people search for to anticipate crowd formations at a certain place and time.
"Our algorithm is able to use crowd data from Baidu maps to predict how many people will be [at a certain location] in the next two hours," reports Baidu researcher Wu Haishan. ... "
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