10. EXAMPLE OF COURSE MEASUREMENT
I have to measure a half marathon on a loop course which is very close to 6.5 miles long. The finish position is fixed, and I have to locate the start position and determine how far it is from the finish. To make up the half marathon distance which is 13 miles 192.5 yards (or 21.0975 km) we shall have to do approximately 2 laps (more or less depending exactly how good the lap estimate of 6.5 miles turns out to be).
Pre measurement Calibration (Calibration Course length = 499.55m)
Ride 1: 04000 - 09610, Ride 2: 09610 - 15218, Ride 3: 15218 - 20827, Ride 4: 20827 - 26434
Count at finish line = 34871
Count at finish line after one lap = 52998
Post measurement Calibration (Calibration Course length = 499.55m)
Ride 1: 51000 - 56612.5, Ride 2: 56612.5 - 62221.5, Ride 3: 62221.5 - 67833, Ride 4: 67833 - 73441
Work out the distance from the start to the finish. Do we have more or less than two full laps?
Now check your answer on Page 11