What is Indoor Positioning System and how does it work?

Indoor Positioning System (IPS) is a system just like GPS which provides an indoor location to track stores and people inside a building. It uses technologies like distance measurement to nearby anchor nodes to determine the location.  These nodes are LED, Bluetooth, Inertial Positioning Systems, Wi-Fi positioning systems. These nodes either actively locate mobile devices and tags or provide ambient location or environmental context for devices to get sensed. Floorplan The most important component of an Indoor positioning system
In indoor mapping, at least three independent measurements are needed to unambiguously find a location.  IPS is used for is mainly used for Indoor navigation, Location-based advertising and Emergency response

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