Your SlideShare is downloading. ×
Upcoming SlideShare
Loading in...5

Thanks for flagging this SlideShare!

Oops! An error has occurred.

Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply



Published on

  • Be the first to comment

  • Be the first to like this

No Downloads
Total Views
On Slideshare
From Embeds
Number of Embeds
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

No notes for slide


  • 1. Rate my place: a social network application for crowd- sourcing vernacular geographic areas Julian Rosser and Jeremy Morley Centre for Geospatial Science, University of Nottingham GISRUK - 15 th April, 2010
  • 2. Presentation outline
    • Background
    • Project concept
    • Implementation
    • Demonstration video
    • Pilot application results
    • Conclusions and further work
  • 3. Background
    • Vernacular geography refers to the vague boundaries and informal place names of locations used by people on an everyday basis
    • Places can be unofficial or perceived differently
    • Places like: the North, town centre, downtown, Bloomsbury, West End, Soho
    • Locations more prototypical than others
    • (Montello et al. 2003)
    Definitely NOT the West End Definitely the West End
  • 4. Background
    • People’s geographic perceptions and opinions also vary between individuals
    LondonLeben, 2004.
  • 5. Background
    • Why is this important?
      • Improve system functionality interpreting vagueness :
        • Geographic Information Retrieval (GIR)
        • Ontologies and semantics - naïve, non-experts
        • Usability - more natural user interaction
    • Need a way to capture vernacular areas on a wide scale
    • Sketch map surveys are labour intensive
    • - automated methods
    • (e.g. Arampatzis, et al. 2006)
    • A web 2.0 mapping tool to elicit perceptions
  • 6. Project concept
    • Rate my place Facebook application:
      • User focused on rating areas
      • Spray can to mark vague geographic extents
      • User associates a place name to the extent
      • View an average rating map
    • Ratings – “love”, “like”, “dislike” or “hate”
    • Data collection outcomes:
      • Vernacular dataset of perceived areas
      • Rating map of areas
    • Individual perceptions later aggregated to generate a collaborative definition of place
  • 7. Implementation – base mapping
    • Levels of base mapping detail influence perceptions
    • ‘Hybrid’ style maps offer aerial photography which should help users orient themselves.
    Google maps Microsoft (Bing) maps Google Maps Bing Maps
  • 8. Implementation – Interface mechanisms
    • Two possible spray types
    • Dither Gaussian-like
    • Do user’s prefer a particular spray type?
    • Does one type capture their perception better than the other?
    • Usability – social network users require applications to be fun and enjoyable ( Hart et al. 2008).
  • 9. Implementation – technologies
    • Interface – Google Maps
          • Adobe Flash
    • Server – Rating surface raster
          • PHP
          • GDAL (Geospatial Data Abstraction Library)
          • Python
    • Database – MySQL stores each individual spray
    • Use individual sprays to define collaboratively defined areas
  • 10. Implementation – demo
  • 11. Pilot application results
    • Prototype system ran online for ~5 days
    • Users were asked to rate areas of London
      • 24 users submitted 127 areas
    • 78% found the system
    • simple to use
    • 61% found the system
    • fun to use
    • 65% were happy with
    • the cartography
  • 12. Pilot application results
    • 5 individuals tagged a place as “soho”:
  • 13. Conclusions & Future work
    • A large dataset of vernacular areas can be produced
      • The more contributions the better
    • Data gaps will always exist – areas ignored which are not interesting to Facebook users
      • Integration with other vernacular data sources
    • Users may group multiple areas to one place name
    • Users rating may also influence boundary size
    • Gaussian distribution is not directly controlled by the user
  • 14. Conclusions & Future work
    • Effect of user’s context needs further exploration
      • Mining social network profile
      • User’s location and personal interests
    • Spray extent combination and identification of areas with a significant level agreement
    • Compare with an official gazetteer or boundary datasets - quantification of differences to general perception
  • 15. References
    • Arampatzis, A., Van Kreveld, M., Reinbacher, I., Jones, C., Vaid, S., Clough, P, Joho, H. & Sanderson, M. 2006, Web-based delineation of imprecise regions. Computers, Environment and Urban Systems. 30, pp. 436–459.
    • Flickr Shapefiles. 2009.
    • Hart, J., Ridley, C., Taher, F., Sas, C. & Dix, A. 2008. Exploring the Facebook Experience: A New Approach to Usability. Proceedings of the 5th Nordic conference on Human-computer interaction: building bridges, October 20-22, 2008, Lund, Sweden. Pp. 471-474.
    • LondonLeben, 2004. Mapping London. The real map of London as North Londoners know it. Available from:
    • Montello, D. R., Goodchild, M. F., Gottsegen, J., and Fohl, P. 2003. Where's downtown?: Behavioral methods for determining referents of vague spatial queries. Spatial Cognition & Computation. 3(2):185-204. P.201.
  • 16. Summary
    • Rate-my-place is now online in Facebook. Please submit
    • your opinions and spread the word...