Indoor positioning technologies have the potential to be a revolutionary technology in the same way that mass market access to GPS revolutionised outdoor navigation. No single indoor positioning technology currently exists to provide a solution for every indoor navigation use case, however many candidate technologies have been proposed. Future indoor navigation systems are likely to need to call upon the strengths of many technologies to provide a hybrid position solution. We review a selection of state of the art indoor positioning technologies and discuss the results of a Context of Use analysis of potential user groups in this domain. Based on the result of this analysis we suggest challenges that need to be tackled by future research in this area.
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