This document summarizes a presentation about visualizing Twitter data on a map. It discusses using the Twitter Streaming API to collect live tweets with locations and geocoding them to plot on a Google Map. An example project is shown that mapped tweets containing #earthquake from the 2011 Japan earthquake, with over 1 million tweets plotted on the map. The document concludes by thanking supporters and providing contact details for the presenter.

1. TwitterDots
Rio Akasaka
data visualization meetup
13 April 2011
Friday, October 5, 2012

2. A dot
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3. Friday, October 5, 2012

4. Friday, October 5, 2012

5. Friday, October 5, 2012

6. Friday, October 5, 2012

7. Data visualization
is storytelling
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8. Friday, October 5, 2012

9. HOW MIGHT WE
Collect
many individual stories
and let the stories
speak for themselves?
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10. Implementation
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11. Twitter + Map
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12. Friday, October 5, 2012

13. Twitter Streaming API
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14. Twitter Streaming API
+ (Live and real-time)
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15. Twitter Streaming API
+ (Live and real-time)
+ Geocoding
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16. Twitter Streaming API
+ (Live and real-time)
+ Geocoding
+ Google Maps
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17. Geocoding
• Yahoo! 5,000 requests/IP per day
• Google 2,500 requests/day
• 0.23% of tweets are geocoded (Sysomos)
• 15% (SocMedia)
Friday, October 5, 2012

18. Geocoding
• Yahoo! 5,000 requests/IP per day
• Google 2,500 requests/day
• 0.23% of tweets are geocoded (Sysomos)
• 15% (SocMedia)
Twitter does not provide geocoded data
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19. Geocoding
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20. #valentine
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21. Results
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22. Results
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23. Results
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24. Results
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25. Twitter
Tweets containing #earthquake
from 4:27pm PST 3/9/2011
to 8:01pm PST 3/11/2011
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26. Twitter
1,881,119 total tweets
1,162,303 tweets with locations (61%)
991,668 successfully geocoded (85%/52%)
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27. Twitter
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28. Twitter
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29. Demo!
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30. Foraging
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31. Limitations
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32. Limitations
• Hardware
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33. Limitations
• Hardware
• Geocoding
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34. Limitations
• Hardware
• Geocoding
• Ideas!
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35. Twitter
http://bit.ly/twitterearthquake
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36. Thank you!
This would not have been possible without support from
Jeff Heer, Sep Kamvar, Geoff McGhee, Eli Marschner, Michelle Greer
http://bit.ly/akasaka
@rioakasaka
twitterdots.com
twitterdots.posterous.com
Friday, October 5, 2012