![]() ![]() ![]() The accuracy depends on the accuracy of the database (e.g. Typically a wireless access point is identified by its SSID and MAC address, and these data are compared to a database of supposed locations of access points so identified. The most common technique for positioning using wireless access points is based on a rough proxy for the strength of the received signal ( received signal strength indication, or RSSI) and the method of "fingerprinting". Wi-Fi positioning takes advantage of the rapid growth in the early 21st century of wireless access points in urban areas. Such systems include assisted GPS, urban positioning services through hotspot databases, and indoor positioning systems. It is used where satellite navigation such as GPS is inadequate due to various causes including multipath and signal blockage indoors, or where acquiring a satellite fix would take too long. Wi-Fi positioning system ( WPS, also abbreviated as WiPS or WFPS) is a geolocation system that uses the characteristics of nearby Wi‑Fi access point to discover where a device is located. ![]()
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