Location may be inserted immediately into the picture file by tethering with Bluetooth or suitable wired connection, which are about as rare in cameras as the built-in autogeotagging feature.
One alternative to GPS is WiFi triangulation which uses the MAC addresses of nearby wireless access points to determine position.
Automatic geotagging relies on media acquisition devices that contain GPS, aGPS, or WiFi or other local positioning systems.
With the rapid rise of mobile smartphones[3] which integrate GPS receivers and cameras, and relative market stagnation of separate devices,[4] these phones are the most numerous instruments for autogeotagging.
Applications for real-time mapping include travel, real estate, geosocial networking, people tracking, security, and geofencing.