1. Tour the world with Yahoo!’s
Time Traveler
Ajitsen Surendran

2. Agenda
• Time Traveler
• Science Behind Time Traveler
• Yahoo Query Language - YQL
• Location Api

3. Let’s see Time Traveler in action

4. Science behind Time traveler
• Automatic Construction of Travel Itineraries
using Social Breadcrumbs

5. Let’s start building with YQL

6. Searching by location
• Bounding Box
– North, East
– South, West
• Radius search
– Give Center co-ordinates in lat, lon
– Radius in kilometers
• Where on Earth ID - WOEID
• Point of Interest - POI

7. Where am I ? – Ask the User

8. Where am I? – Ask the Browser
HTML 5

9. Infer location from IP & Content
• Online advertisement
• Detect the home address of person
• BOSS ‘s PlaceSpotter can be used to find
location given a text

10. NOTES
Slide 3:
Youtube Video: http://www.youtube.com/watch?v=Lv1aCLjDS0Q
Images in this slide were taken from http://www.webpronews.com/yahoo-time-traveler-app-2012-05
Slide 4:
ACM Ref: http://doi.acm.org/10.1145/1810617.1810626
Choudhury, Munmun De; Feldman, Moran; Amer-Yahia, Sihem; Golbandi, Nadav; Lempel, Ronny & Yu, Cong. (ACM 2010)
Slide 5:
YQL Tutorial Screen cast: http://developer.yahoo.com/yos/screencasts/yql_screencast.html ( 5 min )
YQL Console http://developer.yahoo.com/yql/console/
Get flickr images of Kolkata, searching by geo
http://bit.ly/Xh4OiO
Slide 6:
select * from geo.places where text="sfo”
http://developer.yahoo.com/yql/console/#h=select%20*%20from%20geo.places%20where%20text%3D%22sfo%22
Get location from lat, lon
select * from google.geocoding where q="40.714224,-73.961452”
http://yhoo.it/VNvKqV
East 180, North 90, West -180, South -90
WOEID
http://developer.yahoo.com/geo/geoplanet/guide/concepts.html#woeidsplanet
Distance between two points in kilo meters given lat lon ( and more )
http://www.movable-type.co.uk/scripts/latlong.html
Slide 8:
http://html5demos.com/geo
Slide 9:
Boss PlaceSpotter:- http://developer.yahoo.com/boss/geo/docs/key-concepts.html

11. Questions ?