OBD GPS Logger understands "trips". Basically, it means you can keep multiple logs in the same database without issue. The logging tool automatically stops and starts logging whenever the engine is turned off and on. What you see on this page is the first test drive after I implemented trips, with me just driving around turning the engine off at some stoplights.
Height at each point indicates speed, and color indicates engine efficiency at the time. You can see the MPG plummet as we accellerate away from stops, and hit the maximum value as we slow down. The white graph indicates engine RPM.
This trip was driving my Mini Cooper S.
The output from obdlogger: testing-trips.db
Open this in Google Earth: testing-trips.kml
CSV file for your favorite spreadsheet: testing-trips.csv