odographs
/ˈoʊdəˌɡræfs/
noun
- A device that records the distance traveled by a vehicle, typically by drawing a line on a chart.
- Before digital GPS, explorers relied on an odograph to record their journeys.
- Engineers used an odograph to map the exact route of the survey vehicle.
- The old truck had an odograph that scratched a line on a paper roll as it moved.