[tropchan]

Sorry I didn't answer more quickly.

Yes, that's what I mean by crowdsourced data. I agree on the safety concerns while driving. However, even if you could collect data on emotions of people throughout the day in a city... that would be insanely useful for planners... aka knowing when people are angry sitting in traffic, scared in sketchy areas of the city, or where they go for walks often because it's a beautiful park. They can analyze all that data to plan smarter cities. The issue here is: how do you engage the "crowd" enough for them to share this data?

Yes the city API idea is definitely cool. With all the data opening up it's good timing for sure... Only thing is, I heard the API aren't exactly perfect. Depends on what you are working on. I met with a Founder of a Parking App that was building on data like you are talking about.