mapstyle: automatic rendering of a cassini style

Automatic rendering of a Cassini style

Sidonie Christophe, Charlotte Hoarau, LauraneBoulanger, Jeremie Turbet, David Vanderhaeghe

IGN-F/COGIT, IRIT - France

ICC 2015 - August 23-27th 2015

IIntroduction

InspirationSources

Method

Results

Conclusions& perspec-tives Introduction

Automatic rendering of a Cassini style � ICC15 � 2 / 28 IGN-F/COGIT, IRIT - France

IIntroduction

InspirationSources

Method

Results

Conclusions& perspec-tives

Motivation

I Map design inspired by other visualizations (photographs, paintings,graphical charts, maps, etc.)

Which graphical characteristics to transfer?

Which design operations are required?


IIntroduction

InspirationSources

Method

Results


Motivation

(Christophe 2011, Christophe & Hoarau 2013)Automatic rendering of a Cassini style � ICC15 � 3 / 28 IGN-F/COGIT, IRIT - France

IIntroduction

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Pictorial Style

I Transfer function between scene properties and a set of primitives withattributes (color, color gradient, etc.) (Willats & Durand 2003)

I Existing rendering methods coming from Computer Graphics (Hertzmann et al.

2001, Landes et al. 2013)


IIntroduction

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Related research works

(Semmo et al. 2013, Trapp et al. 2015)


IIntroduction

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Aim of the talk

I Preliminary cartographic analysis of Cassini maps

I Extension of SLD for expressive renderings

I....in order to make Cassini-style (& others) maps


Introduction

IInspirationSources

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Conclusions& perspec-tives Inspiration Sources


Introduction

IInspirationSources

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Cassini maps: 1rst sketch survey ”minute”

c©IGN


Introduction

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Cassini maps: 2nd sketch + distance computation in Paris ”minute verifiee”

c©IGN


Introduction

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Cassini maps: 3rd sketch survey ”minute II”

c©IGN


Introduction

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Cassini maps: final N&B map after engraving

c©IGN


Introduction

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Cassini maps: watercolorized version of Marie-Antoinette

c©BNF


Introduction

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Cassini maps: reference map


Introduction

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Cassini maps


Introduction

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IMethod

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Conclusions& perspec-tives Method


Introduction

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Cassini maps with existing OGC SLD/SE norms

Styled Layer descriptor (SLD) / Symbology Encoding (SE)


Introduction

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Rendering process

I How to describe the style?


Introduction

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Style model: SLD/SE norms extension

I Fill: with textures (procedural, patches, vectorial)I Linear: with brushstrokes


Introduction

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Style model implementation: expressive stroke (1/3)

I Relation between characteristics of brush and paper: color computation

stroke pressuretexture heightpaper heighttexture (tool shape)


Introduction

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Introduction

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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


Introduction

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IMethod

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Style model implementation: texture generation (3/3)

I 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.


Introduction

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Conclusions& perspec-tives Results


Introduction

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Cassini style implementation


Introduction

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Derain style implementation: Inspiration Source


Introduction

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Derain style implementation: patches


Introduction

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Derain style implementation: brush painting


Introduction

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Derain style implementation


Introduction

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IConclusions& perspec-tives Conclusions & perspectives


Introduction

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IConclusions& perspec-tives

Conclusions and perspectives

IImplemented expressive style model & related rendering pipeline(http://oxygene-project.sourceforge.net/)

implementation of controllable design tools

I First step toward a Cassini style

basis for analysis of cartographic practices

knowledge identification about styles/data representation

I Forthcoming works on Cassini renderings

relief rendering: more perceived than realistic

data/scale/style interpolation between Cassini and contemporary maps

I Evaluation of resulting Cassini-style maps


http://oxygene-project.sourceforge.net/

[email protected] work is supported by the French National Research Agency: MapStyle Project [ANR-12-CORD-0025]

mapstyle: automatic rendering of a cassini style

Presentations & Public Speaking