Rate my place:  a social network application for crowd- sourcing vernacular geographic areas   Julian Rosser and Jeremy Mo...
Presentation outline <ul><li>Background </li></ul><ul><li>Project concept </li></ul><ul><li>Implementation </li></ul><ul><...
Background <ul><li>Vernacular geography  refers to the vague boundaries and informal place names of locations used by peop...
Background <ul><li>People’s geographic perceptions and opinions also vary between individuals </li></ul>LondonLeben, 2004.
Background <ul><li>Why is this important? </li></ul><ul><ul><li>Improve system functionality interpreting  vagueness : </l...
Project concept <ul><li>Rate my place Facebook application: </li></ul><ul><ul><li>User focused on  rating areas </li></ul>...
Implementation – base mapping <ul><li>Levels of base mapping detail influence perceptions </li></ul><ul><li>‘Hybrid’ style...
Implementation – Interface mechanisms <ul><li>Two possible spray types  </li></ul><ul><li>Dither Gaussian-like </li></ul><...
Implementation – technologies <ul><li>Interface  – Google Maps </li></ul><ul><ul><ul><ul><li>Adobe Flash </li></ul></ul></...
Implementation – demo
Pilot application results <ul><li>Prototype system ran online for ~5 days </li></ul><ul><li>Users were asked to rate areas...
Pilot application results <ul><li>5 individuals tagged a place as “soho”: </li></ul>
Conclusions & Future work <ul><li>A large dataset of vernacular areas can be produced </li></ul><ul><ul><li>The  more cont...
Conclusions & Future work <ul><li>Effect of user’s context needs further exploration </li></ul><ul><ul><li>Mining social n...
References <ul><li>Arampatzis, A., Van Kreveld, M., Reinbacher, I., Jones, C., Vaid, S., Clough, P, Joho, H. & Sanderson, ...
Summary <ul><li>Rate-my-place is now online in Facebook. Please submit </li></ul><ul><li>your opinions and spread the word...
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3B_4_Rate-my-place

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3B_4_Rate-my-place

  1. 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. 2. Presentation outline <ul><li>Background </li></ul><ul><li>Project concept </li></ul><ul><li>Implementation </li></ul><ul><li>Demonstration video </li></ul><ul><li>Pilot application results </li></ul><ul><li>Conclusions and further work </li></ul>
  3. 3. Background <ul><li>Vernacular geography refers to the vague boundaries and informal place names of locations used by people on an everyday basis </li></ul><ul><li>Places can be unofficial or perceived differently </li></ul><ul><li>Places like: the North, town centre, downtown, Bloomsbury, West End, Soho </li></ul><ul><li>Locations more prototypical than others </li></ul><ul><li>(Montello et al. 2003) </li></ul>Definitely NOT the West End Definitely the West End
  4. 4. Background <ul><li>People’s geographic perceptions and opinions also vary between individuals </li></ul>LondonLeben, 2004.
  5. 5. Background <ul><li>Why is this important? </li></ul><ul><ul><li>Improve system functionality interpreting vagueness : </li></ul></ul><ul><ul><ul><li>Geographic Information Retrieval (GIR) </li></ul></ul></ul><ul><ul><ul><li>Ontologies and semantics - naïve, non-experts </li></ul></ul></ul><ul><ul><ul><li>Usability - more natural user interaction </li></ul></ul></ul><ul><li>Need a way to capture vernacular areas on a wide scale </li></ul><ul><li>Sketch map surveys are labour intensive </li></ul><ul><li> - automated methods </li></ul><ul><li>(e.g. Arampatzis, et al. 2006) </li></ul><ul><li>A web 2.0 mapping tool to elicit perceptions </li></ul>
  6. 6. Project concept <ul><li>Rate my place Facebook application: </li></ul><ul><ul><li>User focused on rating areas </li></ul></ul><ul><ul><li>Spray can to mark vague geographic extents </li></ul></ul><ul><ul><li>User associates a place name to the extent </li></ul></ul><ul><ul><li>View an average rating map </li></ul></ul><ul><li>Ratings – “love”, “like”, “dislike” or “hate” </li></ul><ul><li>Data collection outcomes: </li></ul><ul><ul><li>Vernacular dataset of perceived areas </li></ul></ul><ul><ul><li>Rating map of areas </li></ul></ul><ul><li>Individual perceptions later aggregated to generate a collaborative definition of place </li></ul>
  7. 7. Implementation – base mapping <ul><li>Levels of base mapping detail influence perceptions </li></ul><ul><li>‘Hybrid’ style maps offer aerial photography which should help users orient themselves. </li></ul>Google maps Microsoft (Bing) maps Google Maps Bing Maps
  8. 8. Implementation – Interface mechanisms <ul><li>Two possible spray types </li></ul><ul><li>Dither Gaussian-like </li></ul><ul><li>Do user’s prefer a particular spray type? </li></ul><ul><li>Does one type capture their perception better than the other? </li></ul><ul><li>Usability – social network users require applications to be fun and enjoyable ( Hart et al. 2008). </li></ul>
  9. 9. Implementation – technologies <ul><li>Interface – Google Maps </li></ul><ul><ul><ul><ul><li>Adobe Flash </li></ul></ul></ul></ul><ul><li>Server – Rating surface raster </li></ul><ul><ul><ul><ul><li>PHP </li></ul></ul></ul></ul><ul><ul><ul><ul><li>GDAL (Geospatial Data Abstraction Library) </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Python </li></ul></ul></ul></ul><ul><li>Database – MySQL stores each individual spray </li></ul><ul><li>Use individual sprays to define collaboratively defined areas </li></ul>
  10. 10. Implementation – demo
  11. 11. Pilot application results <ul><li>Prototype system ran online for ~5 days </li></ul><ul><li>Users were asked to rate areas of London </li></ul><ul><ul><li>24 users submitted 127 areas </li></ul></ul><ul><li>78% found the system </li></ul><ul><li>simple to use </li></ul><ul><li>61% found the system </li></ul><ul><li>fun to use </li></ul><ul><li>65% were happy with </li></ul><ul><li>the cartography </li></ul>
  12. 12. Pilot application results <ul><li>5 individuals tagged a place as “soho”: </li></ul>
  13. 13. Conclusions & Future work <ul><li>A large dataset of vernacular areas can be produced </li></ul><ul><ul><li>The more contributions the better </li></ul></ul><ul><li>Data gaps will always exist – areas ignored which are not interesting to Facebook users </li></ul><ul><ul><li>Integration with other vernacular data sources </li></ul></ul><ul><li>Users may group multiple areas to one place name </li></ul><ul><li>Users rating may also influence boundary size </li></ul><ul><li>Gaussian distribution is not directly controlled by the user </li></ul>
  14. 14. Conclusions & Future work <ul><li>Effect of user’s context needs further exploration </li></ul><ul><ul><li>Mining social network profile </li></ul></ul><ul><ul><li>User’s location and personal interests </li></ul></ul><ul><li>Spray extent combination and identification of areas with a significant level agreement </li></ul><ul><li>Compare with an official gazetteer or boundary datasets - quantification of differences to general perception </li></ul>
  15. 15. References <ul><li>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. </li></ul><ul><li>Flickr Shapefiles. 2009. http://code.flickr.com/blog/2009/05/21/flickr-shapefiles-public-dataset-10/ </li></ul><ul><li>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. </li></ul><ul><li>LondonLeben, 2004. Mapping London. The real map of London as North Londoners know it. Available from: http://www.londonleben.co.uk/northlondonersview.pdf </li></ul><ul><li>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. </li></ul>
  16. 16. Summary <ul><li>Rate-my-place is now online in Facebook. Please submit </li></ul><ul><li>your opinions and spread the word... </li></ul><ul><li>http://apps.facebook.com/rate_my_place </li></ul>

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