The development of technologies based on data analysis has a revolutionary impact on all aspects of city life, from transportation to healthcare. Almost every modern city now has a data gathering and analyzing programme to help resolve a wide variety of problems. City authorities and businesses actively arm themselves with new optics that allow them to forecast risks and access hitherto unnoticed possibilities. ? What data gathering and processing methods are the most effective? ? How do new data gathering and analysis programmes help increase the quality of life in cities? ? How do city authorities and other players effectively leverage new tools to analyse urban environment? ? How do new optics change our perspective on citydwellers' habitat?