| Summary: | Intensive development of urban systems creates a number of challenges for urban planners and policy makers in order to maintain sustainable growth. Running efficient urban policies requires meaningful urban metrics, which could quantify important urban characteristics including various aspects of an actual human behavior. Since a city size is known to have a major, yet often nonlinear, impact on the human activity, it also becomes important to develop scale-free metrics that capture qualitative city properties, beyond the effects of scale. Recent availability of extensive datasets created by human activity involving digital technologies creates new opportunities in this area. In this paper we propose a novel approach of city scoring and classification based on quantitative scale-free metrics related to economic activity of city residents, as well as domestic and foreign visitors. It is demonstrated on the example of Spain, but the proposed methodology is of a general character. We employ a new source of large-scale ubiquitous data, which consists of anonymized countrywide records of bank card transactions collected by one of the largest Spanish banks. Different aspects of the classification reveal important properties of Spanish cities, which significantly complement the pattern that might be discovered with the official socioeconomic statistics. Banco Bilbao Vizcaya Argentaria Ericsson (Firm) Singapore-MIT Alliance for Research and Technology King Abdulaziz City of Science and Technology (Saudia Arabia). Center for Complex Engineering Systems National Science Foundation (U.S.) MIT-Portugal Program AT&T Foundation Audi Volkswagen Coca-Cola Company Expo 2015 Ferrovial (Firm) Regional Municipality of Wood Buffalo SENSEable City Laboratory Consortium Austrian Science Fund (Doctoral College GIScience DK W 1237-N23)
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