Tree Map!
Just dicking around with R a bit this afternoon…here is a tree map showing the number of weekday transit riders in each city neighborhood (area) compared to the size of the neighborhood (color).
Interpretation:
1. Downtown has many transit riders (because it’s chart area is proportional to that number)
2. Downtown has many riders for it’s geographic size (because it’s dark green in the chart)
Data is from SORTA, 2013 and is available on the data page. Any stop outside of the City limits was classified as ‘other’.
Can you control for transfers? Parameter sweep where percentage of downtown boardings/alightings are not “real”?
Alas, no. It’s just not in the data. They might be tracking that stuff to the extent that they can but if they are they’re not telling anyone about it.