05760742 is referenced by 184 patents and cites 12 patents.

An integrated geographic information and automatic position locating system. In one embodiment, a communication link is provided between a vehicle and at least one base station. A vehicle position tracking system, coupled to a vehicle to be monitored, is connected to the communication link. Likewise, a geographic mapping system also disposed within the vehicle is connected to the communication link. In the present embodiment, the vehicle position tracking system and the geographic mapping system are housed in a portable data terminal. The portable data terminal is removably placed into a docking station located within the vehicle. The integrated vehicle position tracking system and geographic mapping system function both when placed in the docking station, and when removed from the docking station. Thus, the present invention provides a mobile integrated vehicle position tracking system and the geographic mapping system integrated into a portable data terminal. Furthermore, in the present embodiment, the communication link provided between the vehicle and at least one base station can be accessed and utilized even when the portable data terminal is not located within the docking station.

Title
Integrated mobile GIS/GPS/AVL with wireless messaging capability
Application Number
439967
Publication Number
5760742
Application Date
August 20, 1997
Publication Date
June 2, 1998
Inventor
James M Janky
Los Altos
CA, US
Mark E Nichols
Sunnyvale
CA, US
Charles N Branch
Sunnyvale
CA, US
Agent
Patrick T King
Assignee
Trimble Navigation
CA, US
IPC
G01C 21/00
H04B 7/29
G01S 3/02
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