The Wall Street Journal created this great data visualisation to show how New Yorkers are using different kinds of MetroCards on the city's public transit network.
Examining MetroCard Usage uses the Google Maps API to present how the 30-Day Unlimited, Pay Per-Ride and Senior Discount MetroCards are used throughout NYC. Heat maps are created for each card type and useful information windows point out specific locations and usage of the cards that the WSJ finds interesting.
The visualisation also presents data taken after the 12/30/2010 fare increases to examine how usage of the different MetroCards may have changed after the fare rises.
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