Ory_etal_icc_rio2015

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Presentation - International Conference of Cartography 2015 in Rio Janeiro

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Ory_etal_icc_rio2015

  1. 1. 27th International Cartographic Conference August 23-28, 2015 Rio de Janeiro, Brazil Jérémie Ory*, Sidonie Christophe*, Sara Fabrikant**, Bénédicte Bucher* *COGIT Lab. – IGN-France ** GIVA Lab. – University of Zurich HOW DO MAP READERS RECOGNIZE A TOPOGRAPHIC MAPPING STYLE ?
  2. 2. HOW DO MAP READERS RECOGNIZE A TOPOGRAPHIC MAPPING STYLE ?27th ICC2015 2 To depict more effectively a territory To extend knowledge on map usability Topographic maps Orthoimagery Hybrid representation Others cartographic abstractions STAKES To improve the map readability
  3. 3. HOW DO MAP READERS RECOGNIZE A TOPOGRAPHIC MAPPING STYLE ?27th ICC2015 1:25 000 topographic map from Swisstopo 3 CONTEXT A singular and distinctive visual appearance 1:25 000 topographic map from IGN-France Different ways to depict a territory
  4. 4. HOW DO MAP READERS RECOGNIZE A TOPOGRAPHIC MAPPING STYLE ?27th ICC2015 How a topographic style is recognized by the map readers?  Short-term issue  Research questions Which maps characteristics are considered by users for recognition? Which ones are the most representative/used for recognition? 4 ISSUE AND RESEARCH QUESTIONS
  5. 5. HOW DO MAP READERS RECOGNIZE A TOPOGRAPHIC MAPPING STYLE ?27th ICC2015  User’s recognition of visual characteristics 5 APPROACH: TOPOGRAPHIC STYLE
  6. 6. HOW DO MAP READERS RECOGNIZE A TOPOGRAPHIC MAPPING STYLE ?27th ICC2015  Aim of the experiment To identify the visual characteristics which allow users to recognize the IGN-France topographic style • 410 experts in geography and cartography • 85 % are French VISUAL TEST: AIM AND PARTICIPANTS 6  Participants
  7. 7. HOW DO MAP READERS RECOGNIZE A TOPOGRAPHIC MAPPING STYLE ?27th ICC2015 VISUAL TEST : COGNITIVE-TASKS Some visual characteristics are processed pre-attentively Some visual characteristics are memorized No cognitive load / directly perceived Highly representative of the perceived map 7
  8. 8. HOW DO MAP READERS RECOGNIZE A TOPOGRAPHIC MAPPING STYLE ?27th ICC2015  Selection of 6 European topographic map samples designed by various NMAs TEST: MATERIALS  Extraction of 16 visual characteristics of IGN-France topographic style 8
  9. 9. HOW DO MAP READERS RECOGNIZE A TOPOGRAPHIC MAPPING STYLE ?27th ICC2015 14% 16%46% 37%44%91% ICC ACT LINZ IGN-F IGN-FSwisstopo 9 T1: To identify / select a IGN-F topographic map amongst other styles H1: Users are able to recognize a IGN-France topographic style amongst other styles TEST: DISTINCTIVE TOPOGRAPHIC MAPS
  10. 10. HOW DO MAP READERS RECOGNIZE A TOPOGRAPHIC MAPPING STYLE ?27th ICC2015 Classification Method : the Sturges calculation method + Jenks natural thresholds T2: To select the 4 most representative visual characteristics in 4 map samples (no ranks) TEST: REPRESENTATIVE GRAPHICAL CHARACTERISTICS 10 H2: Users visually identify the characteristics representative of the IGN-France style 59% 58%66% 13% 12% 12% 10% 10% 10% 3% 2% 13%24%25%41% 41%
  11. 11. HOW DO MAP READERS RECOGNIZE A TOPOGRAPHIC MAPPING STYLE ?27th ICC2015 Classification Method : the Sturges calculation method + Jenks natural thresholds T3: To select the 4 most representative visual characteristics from memory (no ranks) TEST: MEMORIZED GRAPHICAL CHARACTERISTICS 11 H3: Users memorize visual characteristics of IGN-France style 55% 47%74% 13% 12% 10% 9% 7% 5% 2%22% 32% 25%26%30%30%
  12. 12. HOW DO MAP READERS RECOGNIZE A TOPOGRAPHIC MAPPING STYLE ?27th ICC2015 VISUALIZATION OF MAIN RESULTS 12
  13. 13. HOW DO MAP READERS RECOGNIZE A TOPOGRAPHIC MAPPING STYLE ?27th ICC2015 VISUALIZATION OF MAIN RESULTS 13 In visualizing four maps : visual perception
  14. 14. HOW DO MAP READERS RECOGNIZE A TOPOGRAPHIC MAPPING STYLE ?27th ICC2015 VISUALIZATION OF MAIN RESULTS 14 In visualizing four maps : visual perceptionWithout visualizing maps : visual memory
  15. 15. HOW DO MAP READERS RECOGNIZE A TOPOGRAPHIC MAPPING STYLE ?27th ICC2015 VISUALIZATION OF MAIN RESULTS 15 In visualizing four maps : visual perceptionWithout visualizing maps : visual memoryVisual perception (H2) Visual memory (H3)Complete topographic map
  16. 16. HOW DO MAP READERS RECOGNIZE A TOPOGRAPHIC MAPPING STYLE ?27th ICC2015 RESULTS Different kinds of cartographic information Style signature information 16 Visual salient information Secondary information Location information
  17. 17. HOW DO MAP READERS RECOGNIZE A TOPOGRAPHIC MAPPING STYLE ?27th ICC2015 SUMMARY Identification of visual characteristics for user’s recognition of IGN-France style in Visual perception Visual memory 17 The IGN-France style is quite well recognized by French experts Due to their mapping experience and cartographic knowledge Due to the users nationality (knowledge of the depicted territory) Proposition to classify visual characteristics into 4 distinctive groups Style signature information Visual salient information Located information Secondary information
  18. 18. HOW DO MAP READERS RECOGNIZE A TOPOGRAPHIC MAPPING STYLE ?27th ICC2015  To formalize the knowledge on topographic style in an unifying framework 18 SUMMARY 18
  19. 19. HOW DO MAP READERS RECOGNIZE A TOPOGRAPHIC MAPPING STYLE ?27th ICC2015  To formalize the knowledge on topographic style in an unifying framework 19 SUMMARY 19
  20. 20. HOW DO MAP READERS RECOGNIZE A TOPOGRAPHIC MAPPING STYLE ?27th ICC2015  My approach is replicable 20 • 163 experts in geography and cartography • 40 % are Swiss Participants 69% 62%70% 64% 61%67% Visual memory Visual perception OUTLOOKS Example : Identification the representative visual characteristics of the Swisstopo style
  21. 21. HOW DO MAP READERS RECOGNIZE A TOPOGRAPHIC MAPPING STYLE ?27th ICC2015  How to use this new knowledge? OUTLOOKS Design new topographic styles by interpolating between two or more original topographic styles Example : border area 21 Mix topographic maps effectively with orthoimagery (Hoarau 2015) SwisstopoIGN-France Abstraction Orthoimagery
  22. 22. Jérémie Ory jeremie.ory@ign.fr @Jersig 27th International Cartographic Conference August 23-28, 2015 Rio de Janeiro, Brazil

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