Barcelona commercial footprints

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For each spatial cell, data displays distances traveled by customers from their origin to each cell. City is splitted into spatial cells (450x550m) and customers are divided into 3 categories, according to their origin: citizens of the city, people living outside the city but in the province of Barcelona and people living outside the province.

About
This data visualization has been built by Xavi Gimenez as part of the Innova Big Data Challenge contest.

Data is provided by BBVA's Developer platform and the API provided by the bank. The data contains purchases made between 2012 and 2013, as well as demographic origin of customers and estimations about the distance they cover from their origin to the point of the purchase.
Expenditures and distance traveled by BBVA's customers at this location:
From city From province Others