Alpha test.
Installed a freshly built TransDEM exe on my netbook, placed the netbook into my car, connected my hand-held Garmin GPS to it via USB, acitivated the new GPS track log feature in TransDEM and started driving.
To gap the bridge between the Garmin private protocol over USB and standard NMEA0183 which TransDEM expects, I use some 3rd party software, called "
GpsGate Client Express" which is the freeware version.
Result on top of a 1:25,000 topo map:
For a longer trip one should adjust the battery conservation settings on the netbook/laptop to prevent it from entering sleep mode with TransDEM still logging. These modern netbooks last quite a while on battery nowadays.