You can specify a geofence for a Location. Specifying geofence for a Location will allow you to get notification emails for a Shipment if its associated GPS enabled sensor (e.g.Sendum) is found to be arrived within the geofence area of the Location. Thus this functionality allows you to receive notification about a Shipment Departure from a Location and Arrival in a Location.
To define the geofence for a location go to the Location menu item and click on the button and then click on the Map tab.
Click on the Geofence button. The screen will show the map with location icon to which you can interact with to specify the geofence. You can define the geofence as a circular area around the location. Use the Left-click of the mouse to define the geofence in the map. As shown in the following image a circular geofence will be shown around the Location and radius of the circle will be shown in the Radius field.