This is my first post on the board. I usually bother Justin Kuo with these types of questions, and he always answers quickly and with detail, but as I may start doing more measurements I don't want to take up so much of his time. Justin, thanks for your help, and you can still answer here if you wish!
I'm going to measure a 5M loop course next week. I've mapped it online and run it with my Garmin 305 and the full loop looks to be about 8070m, +/- 40M. If that holds true the finish will come up just short of the start line. The start/finish is on a straight road which is 300m long and the S/F will be near the middle of that.
I'm trying to figure out ahead of time how to handle contingencies. And there's also a bias by the RD (and myself) toward having the same start/finish line.
If the loop is slightly long, as expected, can I also measure the entire loop? Or is it good enough (identical?) to measure 8047m and then tape measure the distance/gap between S & F, and put that on the map? Is that "gap" certifiable? Can both the 8047m and entire loop distance be certified in one fell swoop as they are so close? Obviously a newbie question.
This may be another way of asking what's best to do to give the RD easiest way to move both lines should he change his mind this year or in the future. Or is this a way to make future recurring income, by charging him an incremental fee when he decides to move it 50m?
What do measurers think about using a 8070m course for a 5M race in order to maintain the same S/F line? As a runner I'm trying to decide what I will think when I race it. The RD would have a certified 5M course (and then some by 23m) and 7 min milers would run 6s slower than they should. Anyone who reviewed the certificate would know they ran extra and could subtract the 6s to get their "real 5M" time for their personal records.
If the LOOP turns out to be 8040m long, how do you note the gap (7m) so that the race director can slide the course in the future? Would/can you note on map/certificate that the Loop is 8,040, or do you instead simply state that the S and F lines are 6.72m apart?
I am thinking about doing a quick extra ride before I do my two measurement rides in order to know the distance within 6m, and be able to answer some of my own questions before starting. Would anyone else spend an extra 25 minutes to do that?
P.S. I already know I tend to overanalyze things, but you can tell me anyway.