Location-based services, navigation and way finding in three-dimensional worlds are some challenges of current research in mobile computing and information systems. This paper introduces a prototype of future mobile city information systems. In 3D City Info research project, we integrated in one prototype system a three-dimensional city model, a map and a database, which includes information from the same area. In addition, we have built a fully working mobile laptop version of the 3D City Info with an integrated GPS receiver for our field tests. Our preliminary user study appears to support the conclusion that three-dimensional model integrated to a map appears to visualize motion better than a map alone. In the user interface design a user's possibility to adapt separately a model and a map might be worth considering in the future.
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Vainio et al. (2002) studied this question.
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