Topographic maps, orthoimagery, vector thematic data convey various views of the real world. Geovisualization tools and geoportals widely provide these heterogeneous data to users. They bring users to co-visualize them in order to make suitable visualizations adapted to a task, a purpose or an application. Nevertheless, existing tools do not help to make satisfactory, elaborated and efficient visualizations. This paper presents a part of a PhD work in progress: conceptual and technical issues about proposing raster and vector co-visualization methods are detailed. The authors aim at proposing tools to explore a continuum of possible visualizations, between the photorealism of an orthoimage and the abstraction of a topographic map. Three methods to reach this objective are presented and discussed: patchwork between a map and an ortho-image, adaptive symbolization when overlaying data and fluid camouflage of a map in an ortho-image.
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ICC 2013 : Mixing, blending, merging or scrambling topographic maps and orthoimagery in geovisualization ?
1. MIXING, BLENDING, MERGING OR SCRAMBLING
TOPOGRAPHIC MAPS AND ORTHOIMAGERY
IN GEOVISUALIZATION ?
Charlotte Hoarau, Sidonie Christophe, Sébastien Mustière
International Cartographic Conference (ICC) - Tuesday, August 27th 2013
3. 4Charlotte Hoarau 26th International Cartographic Conference, Dresde – 27/08/2013
Aims of my PhD
Orthoimagery Topographic map
4. 5Charlotte Hoarau 26th International Cartographic Conference, Dresde – 27/08/2013
Aims of my PhD
How to combine them
to build in-between visualizations ?
Orthoimagery Topographic map
5. 6Charlotte Hoarau 26th International Cartographic Conference, Dresde – 27/08/2013
Continuum of « In-between » representations
build with the French Geoportail
6. 7Charlotte Hoarau 26th International Cartographic Conference, Dresde – 27/08/2013
Continuum of « In-between » representations
build with the French Geoportail
7. 8Charlotte Hoarau 26th International Cartographic Conference, Dresde – 27/08/2013
Continuum of « In-between » representations
build with the French Geoportail
8. 9Charlotte Hoarau 26th International Cartographic Conference, Dresde – 27/08/2013
Continuum of « In-between » representations
build with the French Geoportail
9. 10Charlotte Hoarau 26th International Cartographic Conference, Dresde – 27/08/2013
Continuum of « In-between » representations
build with the French Geoportail
10. 11Charlotte Hoarau 26th International Cartographic Conference, Dresde – 27/08/2013
Continuum of « In-between » representations
build with the French Geoportail
19. 20Charlotte Hoarau 26th International Cartographic Conference, Dresde – 27/08/2013
Browsing « In-between » representation
Orthoimagery
Topographic
Map
How to provide the more
useful information to the user?
21. 22Charlotte Hoarau 26th International Cartographic Conference, Dresde – 27/08/2013
Layer overlaid
Map design issue : Orthoimagery is dark and visually complex
Difficulty to symbolize vector layers in consistency with different backgrounds
27. 28Charlotte Hoarau 26th International Cartographic Conference, Dresde – 27/08/2013
Map design issues
How to portray vector data
overlaid to an imagery background ?
29. 30Charlotte Hoarau 26th International Cartographic Conference, Dresde – 27/08/2013
« Camouflage » method
Using landscape colors to make maps more realistic
[Christophe, Perret, Hoarau 2013]
[Patterson 2010]
30. 31Charlotte Hoarau 26th International Cartographic Conference, Dresde – 27/08/2013
« Camouflage » method
Extracting colors from the orthoimagery
Re-injecting them in the map specification
36. 37Charlotte Hoarau 26th International Cartographic Conference, Dresde – 27/08/2013
« Patchwork » method
Keeping the best parts of each initial visualizations
Master Student
[J. Gautier, 2012]
37. 38Charlotte Hoarau 26th International Cartographic Conference, Dresde – 27/08/2013
« Patchwork » method
Keeping the best parts of each initial visualizations
Master Student
[J. Gautier, 2012]
38. 39Charlotte Hoarau 26th International Cartographic Conference, Dresde – 27/08/2013
« Patchwork » method
Keeping the best parts of each initial visualizations
Master Student
[J. Gautier, 2012]
42. 43Charlotte Hoarau 26th International Cartographic Conference, Dresde – 27/08/2013
Adaptive symbolization
Different visual impact of background layers
« Inversion » of conventional colors
43. 44Charlotte Hoarau 26th International Cartographic Conference, Dresde – 27/08/2013
Local adaptive symbolization
Wide variety of colors in an orthoimagery background
Local adaptation of the color of the roads
44. 45Charlotte Hoarau 26th International Cartographic Conference, Dresde – 27/08/2013
Local adaptive symbolization
Wide variety of colors in an orthoimagery background
Smart halo around the roads
46. 48Charlotte Hoarau 26th International Cartographic Conference, Dresde – 27/08/2013
Conclusion & Further Works
Combining topographic maps and orthoimagery
is a great opportunity…
and a big challenge !
And Now ?
Combine methods together in an automated
geovisualization platform
Usability tests of resulting co-visualizations
47. « In-between » cartographic representations from the abstraction of
topographic maps to the realism of orthoimagery
Charlotte Hoarau @CartHoarau
This work is granted by the French National Research Agency,
within the project, with the reference ANR-12-CORD-0025.