Indoor navigation: knowledge Most important questions

Indoor GPS: How does navigation work without GPS?

Wonder how navigation can work inside buildings, where GPS is not available? Find out more about alternatives to establish an indoor GPS.

Since GPS is not available inside buildings, indoor navigation systems have to use different techniques. Some of them, such as Wi-Fi and smartphone sensors, are already existent in most situations. Some others, for example beacons or locator nodes (used for analyzing motion profiles) have to be added.

The advantage of Wi-Fi is, that access points are already existent in most cases. One disadvantage is that on Apple devices positioning via Wi-Fi is not possible. Beacons are easily installed and work very accurate (up to 50 cm). Results can be refined by smartphone sensors. Those techniques have one benefit: they can detect the floor level, unlike GPS.

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