  Defining and measuring spatial inequalities across the urban environment
remains a complex and elusive task that has been facilitated by the increasing
availability of large geolocated databases. In this study, we rely on a mobile
phone dataset and an entropy-based metric to measure the attractiveness of a
location in the Rio de Janeiro Metropolitan Area (Brazil) as the diversity of
visitors' location of residence. The results show that the attractiveness of a
given location measured by entropy is an important descriptor of the
socioeconomic status of the location, and can thus be used as a proxy for
complex socioeconomic indicators.
