The document discusses research on analyzing geotagged photos and their metadata like tags. It presents two models - a location-driven model that derives representative tags for map regions based on photo clustering, and a tag-driven model that examines individual tags' patterns to derive meaningful data. It also describes a user study which found that motivations for tagging photos included organization/retrieval, sharing with community, and wanting to inspire or be inspired by others. Suggested tags from the system were seen as very helpful but could potentially lead to overtagging. The research aims to better understand user tagging behaviors and improve applications like photo sharing and search.

1. Photos, Mobile, Location and the Social Media Cycle Mor Naaman Yahoo! Research Berkeley

4. Social Media Cycle How? What? Why?

12. Tag Maps - Paris

13. Tag Maps - SF

14. Tag Maps - Know this place?

15. Summary of San Francisco Golden Gate Bridge TransAmerica AT&T Baseball Park Golden Gate Twin Peaks Golden Gate Bay Bridge Ocean Beach Chinatown

17. Tag Maps - Paris - Les Blogs?

20. Tag patterns

21. Tag patterns

23. Scale-structure Identification Entropy = 1.421621 Entropy = 0.766263 Entropy = 0.555915 Entropy = 0.062760

24. Scale-structure Identification

25. Outline How? What? Why?

27. Another Look at the Tag Map

28. Make it into World Explorer http://tagmaps.research.yahoo.com

37. Suggested Tags “ When I went to upload, there were already all these exotic tags like "Bill Graham Civic Auditorium" and "Bob dylan live" available...it sure was convenient to just select and go…”

41. Outline How? What? Why?

45. A few motivating facts Average Tags, Public ZoneTag Photo: 2.2 Average Tags, Public Shozu Photo: 0.97 Average Tags, Private ZoneTag Photo: 1.85

48. Why Tag? Bay Bridge, Fog, [San Francisco, 94105]

49. Why Tag? RedSox, Fenway, GreenMonster, [Boston, 02215], …

50. Why Tag? Horsetails, handicapped, sign, [Stanford, 94305], …

54. Motivation Taxonomy “ If I tagged ahead of time I can go back and get all my pictures of [my children]…” “… I then think “well, maybe I should tag this” so I can find it again later” “ I’m obsessive-compulsive”

55. Motivation Taxonomy “ I want at least one hook of association in there that can help me reconstruct…”

56. Motivation Taxonomy “ I tag photos with what I think might be interesting to other people, stuff I think people will like” “ I know that tagging can connect my photos to activities, and get more interest” “ I want to look at all [my neighborhood’s] tags. … That’s definitely a reason I’m putting these tags in ”

57. Motivation Taxonomy “… so that my friends can see what I am up to” I can tell my mom [with the tag] “look, we went to…” “ I left reviews of places – like at the airport, when my flight was delayed, I tagged “Aloha Air sucks.”

58. Breakdown

62. Enough already with this stupid figure!

69. International Remix

70. Key Framing

71. Reuse Patterns

72. Reuse Patterns