Presentation at International Cartographic Conference Rio de Janeiro, Brazil, 23-28 August 2015. #icc2015

1. Automatic rendering of a Cassini style
Sidonie Christophe, Charlotte Hoarau, Laurane
Boulanger, J´er´emie Turbet, David Vanderhaeghe
IGN-F/COGIT, IRIT - France
ICC 2015 - August 23-27th 2015

2. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives Introduction
Automatic rendering of a Cassini style ICC15 2 / 28 IGN-F/COGIT, IRIT - France

3. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Motivation
Map design inspired by other visualizations (photographs, paintings,
graphical charts, maps, etc.)
Which graphical characteristics to transfer?
Which design operations are required?
Automatic rendering of a Cassini style ICC15 2 / 28 IGN-F/COGIT, IRIT - France

4. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Motivation
(Christophe 2011, Christophe & Hoarau 2013)
Automatic rendering of a Cassini style ICC15 3 / 28 IGN-F/COGIT, IRIT - France

5. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Pictorial Style
Transfer function between scene properties and a set of primitives with
attributes (color, color gradient, etc.) (Willats & Durand 2003)
Existing rendering methods coming from Computer Graphics (Hertzmann et al.
2001, Landes et al. 2013)
Automatic rendering of a Cassini style ICC15 4 / 28 IGN-F/COGIT, IRIT - France

6. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Related research works
(Semmo et al. 2013, Trapp et al. 2015)
Automatic rendering of a Cassini style ICC15 5 / 28 IGN-F/COGIT, IRIT - France

7. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Aim of the talk
Preliminary cartographic analysis of Cassini maps
Extension of SLD for expressive renderings
....in order to make Cassini-style (& others) maps
Automatic rendering of a Cassini style ICC15 6 / 28 IGN-F/COGIT, IRIT - France

8. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives Inspiration Sources
Automatic rendering of a Cassini style ICC15 7 / 28 IGN-F/COGIT, IRIT - France

9. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Cassini maps: 1rst sketch survey ”minute”
c IGN
Automatic rendering of a Cassini style ICC15 7 / 28 IGN-F/COGIT, IRIT - France

10. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Cassini maps: 2nd sketch + distance computation in Paris ”minute v´erifi´ee”
c IGN
Automatic rendering of a Cassini style ICC15 8 / 28 IGN-F/COGIT, IRIT - France

11. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Cassini maps: 3rd sketch survey ”minute II”
c IGN
Automatic rendering of a Cassini style ICC15 9 / 28 IGN-F/COGIT, IRIT - France

12. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Cassini maps: final N&B map after engraving
c IGN
Automatic rendering of a Cassini style ICC15 10 / 28 IGN-F/COGIT, IRIT - France

13. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Cassini maps: watercolorized version of Marie-Antoinette
c BNF
Automatic rendering of a Cassini style ICC15 11 / 28 IGN-F/COGIT, IRIT - France

14. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Cassini maps: reference map
Automatic rendering of a Cassini style ICC15 12 / 28 IGN-F/COGIT, IRIT - France

15. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Cassini maps
Automatic rendering of a Cassini style ICC15 13 / 28 IGN-F/COGIT, IRIT - France

16. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives Method
Automatic rendering of a Cassini style ICC15 14 / 28 IGN-F/COGIT, IRIT - France

17. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Cassini maps with existing OGC SLD/SE norms
Styled Layer descriptor (SLD) / Symbology Encoding (SE)
Automatic rendering of a Cassini style ICC15 14 / 28 IGN-F/COGIT, IRIT - France

18. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Rendering process
How to describe the style?
Automatic rendering of a Cassini style ICC15 15 / 28 IGN-F/COGIT, IRIT - France

19. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Style model: SLD/SE norms extension
Fill: with textures (procedural, patches, vectorial)
Linear: with brushstrokes
Automatic rendering of a Cassini style ICC15 16 / 28 IGN-F/COGIT, IRIT - France

20. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Style model implementation: expressive stroke (1/3)
Relation between characteristics of brush and paper: color computation
stroke pressure
texture height
paper height
texture (tool shape)
Automatic rendering of a Cassini style ICC15 17 / 28 IGN-F/COGIT, IRIT - France

21. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Style model implementation: expressive stroke (1/3)
Automatic rendering of a Cassini style ICC15 18 / 28 IGN-F/COGIT, IRIT - France

22. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Style model implementation: expressive stroke (1/3)
Automatic rendering of a Cassini style ICC15 19 / 28 IGN-F/COGIT, IRIT - France

23. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Style model implementation: patch distribution texture
(2/3)
Tile Distribution according to, for each patch:
minimum/maximum distance
in/out of range probability
Blending type
Automatic rendering of a Cassini style ICC15 20 / 28 IGN-F/COGIT, IRIT - France

24. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Style model implementation: texture generation (3/3)
Programmable approach to manage complex geometries and structures
Loi H., Hurtut T., Vergne R., Thollot J. Discrete Texture Design Using a Programmable Approach. Siggraph 2013 talks, Anaheim, USA.
Automatic rendering of a Cassini style ICC15 21 / 28 IGN-F/COGIT, IRIT - France

25. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives Results
Automatic rendering of a Cassini style ICC15 22 / 28 IGN-F/COGIT, IRIT - France

26. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Cassini style implementation
Automatic rendering of a Cassini style ICC15 22 / 28 IGN-F/COGIT, IRIT - France

27. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Derain style implementation: Inspiration Source
Automatic rendering of a Cassini style ICC15 23 / 28 IGN-F/COGIT, IRIT - France

28. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Derain style implementation: patches
Automatic rendering of a Cassini style ICC15 24 / 28 IGN-F/COGIT, IRIT - France

29. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Derain style implementation: brush painting
Automatic rendering of a Cassini style ICC15 25 / 28 IGN-F/COGIT, IRIT - France

30. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Derain style implementation
Automatic rendering of a Cassini style ICC15 26 / 28 IGN-F/COGIT, IRIT - France

31. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives Conclusions & perspectives
Automatic rendering of a Cassini style ICC15 27 / 28 IGN-F/COGIT, IRIT - France

32. Introduction
Inspiration
Sources
Method
Results
Conclusions
& perspec-
tives
Conclusions and perspectives
Implemented expressive style model & related rendering pipeline
(http://oxygene-project.sourceforge.net/)
implementation of controllable design tools
First step toward a Cassini style
basis for analysis of cartographic practices
knowledge identification about styles/data representation
Forthcoming works on Cassini renderings
relief rendering: more perceived than realistic
data/scale/style interpolation between Cassini and contemporary maps
Evaluation of resulting Cassini-style maps
Automatic rendering of a Cassini style ICC15 27 / 28 IGN-F/COGIT, IRIT - France

33. sidonie.christophe@ign.fr
This work is supported by the French National Research Agency: MapStyle Project [ANR-12-CORD-0025]