Reply to "Wheel calibrations"

jaywightCertifier

I measured a high school course a couple of weekends ago and I pulled a steel tape over it.

I still think when you're measuring over an unpaved surface the wheel picks up irregularities in almost any surface that a runner won't necessarily have to deal with. Every irregularity, whether up or down, adds counts (or fractions thereof) to the wheel measurement, and those give you a longer length than you should get. The tape is largely immune to that.

I don't think deforming the surface is that big of a deal. For all practical purposes, the earth is the same diameter at the bottom of the deformation than at the top, and I can't imagine the surface is hard enough to deform your measurement instrument.

10/26/1112:02 PM

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