would appreciate info

There is a GPS forum here: http://www.thaivisa.com/forum/forum/145-thailand-maps-gps-placemarks/

Also, I use Sygic, available to download FREE small charge for maps.

http://www.sygic.com/gps-navigation

Excellent (IMHO) and no internet required during operation.

There is a GPS forum here: http://www.thaivisa.com/forum/forum/145-thailand-maps-gps-placemarks/

Also, I use Sygic, available to download FREE small charge for maps.

http://www.sygic.com/gps-navigation

Excellent (IMHO) and no internet required during operation.

Sygic is changing is payment model. Both the application and maps are a free download including navigation. voice-guided turn-by-turn navigation is an upgrade as are traffic speed cameras and HUD

OP is asking about tracking.

Here is an old thread that might be useful. http://www.thaivisa.com/forum/topic/713408-gps-vehicle-tracking/