Listening to Caltrain: Analyzing Train Whistles with Data Science | Hacker News

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		Listening to Caltrain: Analyzing Train Whistles with Data Science (svds.com)
		7 points by wallflower on Feb 6, 2015 \| hide \| past \| favorite \| 1 comment

anigbrowl on Feb 6, 2015 [–]

I don't get it. Why don't you just have your app ask permission to look at the phone GPS and have it anonymously phone home whenever they go to a Caltrain station and start moving (or fail to move) at a train-like speed along the Caltrain route?

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