Barry Kronenfeld Cartograms

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October 15, 2015
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Barry Kronenfeld Cartograms

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NACIS

October 15, 2015
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Transcript

  1. Where the People Are Barry  J  Kronenfeld Eastern  Illinois  University

  2. Population Cartograms Barry J Kronenfeld Motivation 1: Aesthetics “...general readers

    often find all forms of cartograms equally obscure, strange and difficult to follow.” - Manting Tao (2010)
  3. Population Cartograms Barry J Kronenfeld A catalog of monsters?

  4. Population Cartograms Barry J Kronenfeld Cartograms of a different era

  5. Population Cartograms Barry J Kronenfeld

  6. Population Cartograms Barry J Kronenfeld Motivation 2: Error Distribution USA

    1.07x  too  large   West  Bank/Gaza  Strip 3.22x  too  small   Singapore 1.93x  too  small   India 1.02x  too  small  
  7. Population Cartograms Barry J Kronenfeld Motivation 2: Error Distribution Benjamin

     Hennig  on  the  World  Population  Atlas hGp://www.viewsoftheworld.net/?p=832 possible   error   source??
  8. Population Cartograms Barry J Kronenfeld Objectives 1.  Create  software  for

     manual  cartogram   construction 2.  Manually  construct  USA  states  cartogram 3.  Assess: r  accuracy r  aesthetics r  feasibility
  9. 1. Software Environment for Manual Cartogram Construction

  10. Population Cartograms Barry J Kronenfeld Cartogram Studio

  11. Population Cartograms Barry J Kronenfeld Grid Transformation Framework source  grid

      target  grid
  12. Population Cartograms Barry J Kronenfeld Adjust Target Grid World  Population

      Atlas
  13. Population Cartograms Barry J Kronenfeld Adjust Target Grid

  14. Population Cartograms Barry J Kronenfeld Adjust Source Grid

  15. Population Cartograms Barry J Kronenfeld Adjust Source Grid

  16. Population Cartograms Barry J Kronenfeld Dot-Density Metaphor 1  dot  =

     5  million   people  
  17. Population Cartograms Barry J Kronenfeld Adjustment Tools q  Rectangle  Transform

     Tool q  Line  Transform  Tool q  Smudge  Tool
  18. Population Cartograms Barry J Kronenfeld Rectangle Transform Tool

  19. Population Cartograms Barry J Kronenfeld Rectangle Transform Tool

  20. Population Cartograms Barry J Kronenfeld Line Transform Tool

  21. Population Cartograms Barry J Kronenfeld Line Transform Tool

  22. Population Cartograms Barry J Kronenfeld Smudge Tool

  23. Population Cartograms Barry J Kronenfeld Smudge Tool

  24. 2. USA States Population Cartogram

  25. Population Cartograms Barry J Kronenfeld Construction Process

  26. Population Cartograms Barry J Kronenfeld Construction Process

  27. Population Cartograms Barry J Kronenfeld USA States Population Cartogram (final)

  28. Population Cartograms Barry J Kronenfeld Source Grid as Dot-Density Map

  29. 3. Assessment

  30. Population Cartograms Barry J Kronenfeld 3a. Accuracy Assessment 20% 30%

    50% 15% 45% 40% POPULATION: SIZE: APPORTIONMENT   ERROR: 5% 10% + = 15%
  31. Population Cartograms Barry J Kronenfeld Error Comparison SCAPETOAD   0.52%

     APPORTIONMENT  ERROR CARTOGRAM  STUDIO 0.22%  APPORTIONMENT  ERROR
  32. Population Cartograms Barry J Kronenfeld Error Comparison

  33. Population Cartograms Barry J Kronenfeld 3b) Aesthetic Assessment SCAPETOAD  

    (DIFFUSION  ALGORITHM) CARTOGRAM  STUDIO (MANUAL  CONSTRUCTION)
  34. Population Cartograms Barry J Kronenfeld Alabama

  35. Population Cartograms Barry J Kronenfeld West Virginia

  36. Population Cartograms Barry J Kronenfeld Wyoming

  37. Population Cartograms Barry J Kronenfeld Oklahoma

  38. Population Cartograms Barry J Kronenfeld OK, but what about regions

    without straight borders?
  39. Population Cartograms Barry J Kronenfeld Decide for yourself... SCAPETOAD CARTOGRAM

     STUDIO
  40. Population Cartograms Barry J Kronenfeld 3c. Feasibility q  Work  in

     Progress r  personal  results r  classroom  experience
  41. Population Cartograms Barry J Kronenfeld Conclusions q  accuracy  ! r 

    easy  to  handle  small,  high  density  regions q  aesthetics  ! r  possible  to  preserve  straight  lines q  feasibility  !* r  proof-­‐‑of-­‐‑concept  demonstrated q  Future  Work: r  User  Testing  &  Distribution
  42. Population Cartograms Barry J Kronenfeld USA Cartogram & Cartogram Transform

    tool available on my website hQp://ux1.eiu.edu/~bjkronenfeld/
  43. Population Cartograms Barry J Kronenfeld Cartogram Transform (ArcGIS Tool) Cartogram

    as Projection
  44. Population Cartograms Barry J Kronenfeld Mississippi & Columbia Rivers

  45. Population Cartograms Barry J Kronenfeld Acknowledgements q  EIU  Council  on

     Faculty  Research  (CFR)   Grant q  Software  built  on  Dot  Spatial
  46. Population Cartograms Barry J Kronenfeld Questions?