A lire sur: http://searchenginewatch.com/article/2334650/Making-Sense-of-Big-Data-in-Search-Marketing
Big Data, Big Headache
Using Data Integration to Wrangle Big Data
Making Sense of Big Data
1. Selecting the Data
2. Excluding the Data
Big Data Use Cases: The Good, The Bad and The Ugly
"To help allocate its resources efficiently, the City of Boston released the excellent StreetBump smartphone app, which draws on accelerometer and GPS data to help passively detect potholes, instantly reporting them to the city. While certainly a clever approach, StreetBump has a signal problem. People in lower income groups in the US are less likely to have smartphones, and this is particularly true of older residents, where smartphone penetration can be as low as 16%. For cities like Boston, this means that smartphone data sets are missing inputs from significant parts of the population – often those who have the fewest resources."