Barry Kronenfeld Cartograms

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?