Sort:  

The spectrum is huge. I think there are seveal intersection. If you go for analytics of traffic data or anything real.time based it is likely you have to deal with big data.
However, it really comes down to what you want to do and what happens under the hood. You can do Analytics without getting in touch with it. Rather it would have be steps that are coming before you start your analytics.

You are welcome. If you have more questions or if I can help you with anything related to that topic please let me know.