Presentation to the Chicago Data Viz Meetup group in March of 2014. Chicago's bike share program, Divvy, published data on the first 750,000 trips local riders had taken in 2013. As part of the Divvy Data Challenge, I tried to find some meaning to the massive pile of data and had a lot of fun in the process. While I didn't win anything as part of the challenge, I was invited by the City of Chicago's Chief Data Officer (such a cool title), Tom Schenk, to present my project to a Chicago Data Viz Meetup. This presentation was originally delivered in Keynote. Alas, Slideshare prefers PDF. For more specific information on this particular project, check out http://drewdepriest.com/divvy.

1. Analyzing Divvy
Drew DePriest
@drewdepriest
drewdepriest.com/divvy

2. @drewdepriest
1. How far do Divvy-ers ride?
2. How does Chicago get around on Divvy?

3. @drewdepriest
1. How far do Divvy-ers ride?!
2. How does Chicago get around on Divvy?

4. @drewdepriest
How far do Divvy-ers ride?

5. @drewdepriest
How far do Divvy-ers ride?
Haversine Formula
• Distance along a Great Circle
• Not 100% accurate for directions
• Beautifully ugly

6. @drewdepriest
How far do Divvy-ers ride?
Haversine Formula
• Distance along a Great Circle
• Not 100% accurate for directions
• Beautifully ugly

7. @drewdepriest
How far do Divvy-ers ride?

8. @drewdepriest
How far do Divvy-ers ride?

9. @drewdepriest

10. @drewdepriest

11. @drewdepriest
How far do Divvy-ers ride?
(lat0,lng0),(lat1,lng1) routeType=bicycle
distance (miles)

12. @drewdepriest
Joe Barbara!
Technical Director
of Platform Services
How far do Divvy-ers ride?
(lat0,lng0),(lat1,lng1) routeType=bicycle
distance (miles)
special thanks:

13. @drewdepriest
Joe Barbara!
Technical Director
of Platform Services
How far do Divvy-ers ride?
Trip mileages to find: 750,000
(lat0,lng0),(lat1,lng1) routeType=bicycle
distance (miles)
special thanks:

14. @drewdepriest

15. @drewdepriest
How far do Divvy-ers ride?
Total possible trip permutations:

16. @drewdepriest
How far do Divvy-ers ride?
Actual unique trips: 44,422
(~5.9% of all trips in data set)
Total possible trip permutations:

17. @drewdepriest
How far do Divvy-ers ride?
5,000
API Calls
~85 mins
44,422 calls
12 hr 53 mins

18. @drewdepriest
How far do Divvy-ers ride?
5,000
API Calls
~85 mins
44,422 calls
12 hr 53 mins
(Sort of) automated process

19. @drewdepriest
How far do Divvy-ers ride?
(Sort of) automated process

20. @drewdepriest
How far do Divvy-ers ride?
TempoDB
Upload to DaaS (Tempo)

21. @drewdepriest
How far do Divvy-ers ride?
TempoDB
Upload to DaaS (Tempo)
Download, totalize, make pretty
TempoDB

22. @drewdepriest
Total Daily Mileage - Full Set

23. @drewdepriest
Total Daily Mileage - Full Set
Weekend spikes

24. @drewdepriest
Total Daily Mileage - Full Set
Weekend spikes
Sat., 9/28

25. @drewdepriest
Total Daily Mileage - One Week

26. @drewdepriest
Total Daily Mileage - One Week
Labor !
Day

27. @drewdepriest
Total Daily Mileage - One Week
AM Rush
Labor !
Day

28. @drewdepriest
Total Daily Mileage - One Week
AM Rush
Lunch
Labor !
Day

29. @drewdepriest
Total Daily Mileage - One Week
AM Rush
Lunch
PM Rush
Labor !
Day

30. @drewdepriest
Total Daily Mileage vs Building Energy Profile

31. @drewdepriest
Total Daily Mileage vs Building Energy Profile
source: Kellogg Insight “Who Wins with the Smart Grid?” | 2012.AUG.03

32. @drewdepriest
1. How far do Divvy-ers ride?
2. How does Chicago get around on Divvy?

33. @drewdepriest
How does Chicago get around on Divvy?
TempoDB
Upload to DaaS (Tempo)

34. @drewdepriest
How does Chicago get around on Divvy?
TempoDB
Upload to DaaS (Tempo)
Download, make pretty
TempoDB

35. @drewdepriest
Total Daily Mileage vs. High Temp

36. @drewdepriest
Total Daily Mileage vs. High Temp

37. @drewdepriest
Total Daily Mileage vs. High Temp
“Real Bikers”

38. @drewdepriest
Total Daily Mileage vs. Precipitation

39. @drewdepriest
Total Daily Mileage vs. Precipitation

40. @drewdepriest
Total Net “Road Miles” Biked: 1,260,127!
Average car fuel efficiency: 24.9 mpg
How does Chicago get around on Divvy?
study by*
*
Gasoline saved by biking: 50,600 gal

41. @drewdepriest
Total Net “Road Miles” Biked: 1,260,127!
Average car fuel efficiency: 24.9 mpg
How does Chicago get around on Divvy?
study by*
*
Gasoline saved by biking: 50,600 gal
**per EPA
**Enough gasoline energy to power 22 homes
for a year.

42. @drewdepriest
Total Net “Road Miles” Biked: 1,260,127!
Average car fuel efficiency: 24.9 mpg
How does Chicago get around on Divvy?
study by*
*
Gasoline saved by biking: 50,600 gal
**per EPA
**Enough gasoline energy to power 22 homes
for a year.

43. @drewdepriest
• Calculate & publish all 89,700 route shapes
• Find “most-traveled” streets
• Statistical model (a la DSSG)
Future of #DivvyData

44. @drewdepriest
• Calculate & publish all 89,700 route shapes
• Find “most-traveled” streets
• Statistical model (a la DSSG)
Future of #DivvyData
CHI

45. @drewdepriest
• Calculate & publish all 89,700 route shapes
• Find “most-traveled” streets
• Statistical model (a la DSSG)
Future of #DivvyData
CHI
DCATLSF SD AUSTIN SATSLC NYC