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Item The Norwich Virtual City Project(Eurographics Association, 1999) Arnold, D. B.; Day, A. M.This paper describes the early work on implementing a visitor attraction based on the heritage of the Norwich area. The project has been in planning for about three years, but has only just been funded and is due to open in 2001. The paper reviews the background to the project and the city, and considers the expected benefits of the venture. The range of data sources are then reviewed and areas are highlighted where computer science research needs to progress to maximise benefits. The paper then reviews progress to date on the project.Item Distributed Virtual Environments for Urban Modelling(Eurographics Association, 1999) Harvey, D.; Arnold, D. B.; Day, A. M.We describe many of the considerations required when designing and developing a distributed virtual environment for urban modelling, paying particular attention to its application to virtual heritage. We also describe the possibility of using a specially defined set of scenery and building primitives to reduce the amount of data that needs to be transmitted to recreate the virtual urban environment on the observer’s computer.Item Rapid Urban Modelling(Eurographics Association, 1999) Cooper, J. W.; Arnold, D. B.; Day, A. M.We describe a system that allows the rapid creation of virtual urban models. We describe how this system can extract 3D model information from Ordnance Survey maps by using a rule-based modelling approach and a parameterised description for common buildings. We also give ideas about how this system could be extended to add detail to models generated from aerial photographs and to include historical events within the model. Finally we show how the models can support changes in level of detail and compression.