| 摘要 |
A portable location alarm device (1) is provided which allows a user to pre-set an alarm event to occur when the device arrives at a pre-determined location. The alarm event alerts the user by audible, visual or vibrating means (14). The alarm device determines it's actual location using GPS data. The location alarm device is enabled to communicate over one of a wired and wireless interface with a server holding a database so as to enable the location alarm device to access said data base on demand. In a preferred embodiment the database on the server comprises a representation of a map and an alarm setting means allows the alarm location to be specified in terms of features of the map. The user can subsequently set an alarm event f without the need for the device to carry large databases, for example of the type cross-referencing place names to mapping co-ordinates.
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