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Barry Kronenfeld Cartograms

NACIS
October 15, 2015
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Barry Kronenfeld Cartograms

NACIS

October 15, 2015
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  1. 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)
  2. 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  
  3. 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??
  4. 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
  5. Population Cartograms Barry J Kronenfeld Adjustment Tools q  Rectangle  Transform

     Tool q  Line  Transform  Tool q  Smudge  Tool
  6. Population Cartograms Barry J Kronenfeld 3a. Accuracy Assessment 20% 30%

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

     APPORTIONMENT  ERROR CARTOGRAM  STUDIO 0.22%  APPORTIONMENT  ERROR
  8. Population Cartograms Barry J Kronenfeld 3b) Aesthetic Assessment SCAPETOAD  

    (DIFFUSION  ALGORITHM) CARTOGRAM  STUDIO (MANUAL  CONSTRUCTION)
  9. Population Cartograms Barry J Kronenfeld 3c. Feasibility q  Work  in

     Progress r  personal  results r  classroom  experience
  10. 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
  11. Population Cartograms Barry J Kronenfeld USA Cartogram & Cartogram Transform

    tool available on my website hQp://ux1.eiu.edu/~bjkronenfeld/
  12. Population Cartograms Barry J Kronenfeld Acknowledgements q  EIU  Council  on

     Faculty  Research  (CFR)   Grant q  Software  built  on  Dot  Spatial