Currently, visitors of an unknown place are using two-dimensional maps, either as a paper map or as an electronic map on a mobile device, to find their way from a present position to a desired destination. While these maps are indeed able to give a rough survey of a large area, they are often insufficient for orientation in a smaller area, as the line of sight can not directly be deduced from a two-dimensional map. Objects of the real world used typically for orientation, like a high-rise building or other distinctive and prominent objects, are normally not visualized in two-dimensional maps, making it a problem to decide in which direction to go. Especially in areas without road signs, in countries where a visitor is unable to read the signs, or inside of an unfamiliar building, like an airport or a shopping-mall, informational needs, such as the current position and the direction to go, are hardly deducible from a two-dimensional map. This will lead to problems in finding the way to a desired point.
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