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Finding a destination in unfamiliar environments of complex office building or shopping mall has been always bothering everyone in daily life. Fine-scale directional guidance, a combination of location based service and context aware service, is emerging along with the technology developments of mobile computing, wireless communication, and augmented reality. This paper addresses the core problem of how to align what people see with where they are. In order to achieve robust and accurate navigation by 2D/3D alignment, the authors developed a hybrid solution by fusing GPS, inertial measurement units and computer vision methods together. They implemented a prototype of Mobile Augmented Reality and 3D navigation on the manually created virtual environment of Intel China Research Center office and surroundings.
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