Map of courses of known length, taken from the USATF Course Database with additional metadata from Mark Neal's map, plus Athletics Canada certified courses. Used by road-running course measurers to calibrate odometer-equipped bicycles before and after measurements.
If you find an issue with a course:
- Details like course length, city and state, were pulled directly from the USATF database, so ensure the database entry is correct. Contact your regional certifier to make corrections to database errors.
- If the database entry is correct, open an issue or comment in the measurers' forum describing the problem and the fix.
If you have a more precise location for a course, especially the GPS coordinates of the end points, please send them via the forum.
This repo's [data/additional_data.geojson] has GPS coordinates for the endpoints of a small number of courses. If you