Baidu can use map data to give early warnings about dangerous crowds

There are a lot of creepy things you can do with the data gleaned from an online and mobile maps service used by 302 million people, but there are helpful ways to use it too. Baidu, China's version of Google, is making the case that it can use queries made on its maps service to predict areas where overcrowding may put people at risk for fatal accidents. In a paper titled "Early Warning of Human Crowds Based on Query Data from Baidu Map: Analysis Based on Shanghai Stampede," three Baidu researchers based in Beijing lay out an approach to using big data to give early warnings about potential crowd disasters 1-3 hours in advance. This data is already used by Chinese city planners to help them place transportation, facilities, and shops, according to MIT Technology Review. Now it can be used in the interest of public safety, the researchers assert.