Rencontre franco-espagnole de réalité virtuelle et interaction graphique

Girona, December 2007

3D urban GIS methods and tools for modeling, simulation and

visualisation of urban data

Guillaume MoreauEcole Centrale de Nantes - CERMA / IRSTV

http://www.cerma.archi.fr http://www.irstv.cnrs.fr

Environment

• Ecole Centrale Nantes– Computer Science Dept

• CERMA lab– Architectural and urban ambiances– interdisciplinary research (thermics, acoustics, architecture,

CS…)• IRSTV : Research Federation on Sciences and

Techniques of the city– 13 partners– all research topics related to urban management and

sustainable development

• Talk is only focused on VR/AR related aspects

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CERMA Team

• 19 professors and researchers• 11 PhD students• 5 administrative and technical staff

Context: urban data

• Sustainable development and urban planning demand new complex spatial queries

– what are the walls that have less than 2hrs sunlight in summer and more than 6 in winter?

• Data is 3D (+ time) but queries also are– Heterogeneity (nature, scale, source)

• Issues– Modeling, acquisition, update, quality– data query (definition and execution)– data and results visualization

– Towards on site GIS (uses, AR)

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CS Research themes

• Data models – discrete vs. continuous models– multi-scale and multi-representation– Geo-referencing of data

• Data acquisition - update– image georeferencing and knowledge extraction– computer vision

• Representation – Virtual Reality – mobile GIS - Augmented reality– Computer graphics (inverse modeling & simulation)

• GIS– Interoperability, SDI, middleware, GIS usage

Applications: information retrieval and decision-making tools

• Outdoor augmented reality– georeferencing and local registration

• mobile GIS– visualization (light clients)– data acquisition and updating

the « 3D GIS - pictures » loop

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• We believe that

• but also that

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Maps and pictures are both projections of the same environment. There exists an homography…

[Cipolla]

Visualization topics and projects• Stereoscopic visualization confort enhancement (with

ENSMP-CAOR)• VR for ambiences analysis and communication• VR for studying landscape impacts of wind farms

– visual + aural• Generation of 3D urban models• NPR for urban data visualization• Urban indicators

– Query building– Thematic mapping (3D+t) : SLD extension

Partners

• Other IRSTV members (CESTAN/ESO, L3i, IRCCyN, L2G/ESGT)

• Keio University [AR]• UDG - University of Girona [CG]• Ecole des mines de Paris - CAOR [VR]• IICT-SYSIN [GIS]• Sponsors

– Région Pays de la Loire [GIS]– Conseil général de Loire-Atlantique [cultural heritage]– Nantes Métropole [AR]– DCNS [AR]