A geofence is a geographic boundary that you can define and associate with your devices. HERE Tracking can then notify you when a device transitions into or out of a geofence.
Geofences can be circular or polygonal. Circular fences are defined by a centre geo-coordinate and a radius while polygonal fences are defined as a set of geo-coordinates.
Once created, you can associate a device with a geofence. This association means that every time a location update is received from the device, HERE Tracking will compared the location to the area of geofence. If the device has transitioned from outside the geofence to inside or vice versa, a
transition event is recorded and HERE Tracking will generate a