1. 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 Moreau Ecole Centrale de Nantes - CERMA / IRSTV http://www.cerma.archi.fr http://www.irstv.cnrs.fr

2. 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

3. CERMA Team 19 professors and researchers 11 PhD students 5 administrative and technical staff

4. 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)

5. 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

6. Applications: information retrieval and decision-making tools Outdoor augmented reality –georeferencing and local registration mobile GIS –visualization (light clients) –data acquisition and updating

7. the « 3D GIS - pictures » loop + We believe that but also that + you are here! Maps and pictures are both projections of the same environment. There exists an homography … [Cipolla]

8. 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

9. 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]