1. Integrating Virtual Environment and GIS for 3D Virtual City Development and Urban Planning Bin Chen, Fengru Huang, Yu Fang Peking University

2. Content Introduction Virtual World Technology Integrate VW with GIS A Practice of VW Based Virtual City Conclusions and Future Work

3. Introduction Recently innovative technologies offer different ways of modelling and representing urban information with real- time interaction over the Internet. 3 generations of virtual city technology –Web listing by text, image and video –"Flat" cities by 2D map –3D visualization virtual city

4. Virtual World Technology Virtual World is a multi- user 3D creative platform based on virtual environment –Users immersed into virtual environment by avatars –Online collaborative authoring and application development –Different from traditional virtual reality

5. Features of Virtual World Virtual reality environment –Virtual terrain and virtual atmosphere –Dynamics simulation 3D authoring platform –Network oriented 3D modelling –Script language interact among virtual environment, avatars and 3D models communicate with outer process Avatar system Instant messaging

6. Virtual World Technology As a general purpose development platform, VW can be used to support applications from a wide range of fields –Online entertainment, virtual communities –Virtual education and trainning –Scientific visulization –Virtual tour, urban planning –Emergency response and drill –Facility Management

7. Virtual World Technology VWs are becoming the new generation of mainstream Internet contents followed after text, image, audio and video

8. Integrate VW with GIS Extending geodata model by virtual reality –Integrate geodata with 3D models –Support realtime update and modification of virtual scenes Online multi-user collaborative workflow –Emphasize collaborative interaction of multi-user –Increase performance of user-avatar interaction with virtual environment –New method of mapping between 2D geodata and 3D models

9. Integrate VW with GIS Develop human-scale GIS application –Considering features of small scale space Enrich general purpose development platform of VW –Combined with geoprocess model library –Communicate with outer geodatabase and workflow

10. VW Based Virtual City Advantages includes –Network oriented –Fast and low-cost 3D modeling –Multiple plans show –Multi-user collaborative evaluation –Realtime plan modification

11. A Practice of VW Based Virtual City The project integrate the real Shunde Industrial Design City, which hosted in Guangdong of South China, with a virtual environment by geographic mapping and 3D virtual modeling. Based on VW server of Opensimulator About 4 square kilos

12. A Practice of VW Based Virtual City A joystick allows the user avatar to fly- through the 3D model in realtime have a look from different perspectives at complex topographic structures as well as the smallest architectural details.

13. A Practice of VW Based Virtual City Based on the 3D visualization of the real architecture and landscape of Shunde Industrial City, users of different levels and objectives can have varies activities and experiences in virtual environment –including interactive mapping and collaborative modelling, solid, geometric modelling photospatial panoramic views, and multi-user virtual worlds. For urban planning, the planners can construct or move landscape elements –such as roads, buildings, plants, sculptures, bridges, water, etc –based on their observation and consideration in the virtual city collaboratively.

14. Conclusions and Future Work Applications based on virtual world are becoming popular, virtual city and urban planning is a typical case Extending VW with GIS will make virtual city more powerful by many aspects including immersive virtual environment and collaborative interaction Further work will focus on the complete design and development of virtual applications of urban planning

15. End Thanks for your attention!