That's pretty cool! So in theory, I could set up a Pi in my truck (with sufficient power management built in so that turning the ignition off doesn't hard kill the Pi) and just drive around with it feeding data via my hotspot with just adding a GPS unit and using gpsd?
I am using a UPS PIco HV3.0A plus (pimodules.com) which includes a voltage converter for up to 30V and a small backup battery which can be exchanged by larger capacity batteries. This allows to automatically shutdown the pi about 1 minute after the ignition is switched off.
The location is determined by a USB GPS device and for transfer to the internet a UMTS USB stick is used.