When people talk about smart cities, the tendency is to think about them in a technology-oriented or sociology-oriented manner.
However, smart cities are the places where we leave and work everyday now.
Here is a very broad perspective (in Italian) about the experience of big data analysis and smart city instrumentation for the town of Como, in Italy: an experience on how phone calls, mobility data, social media, people counters can contribute to take and evaluate decisions.
You can read it on my Medium channel.
https://medium.com/@marcobrambi/per-una-smart-city-che-parte-dai-dati-13a72d2568f8#.klubeviwu