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Reply to "Elevations from various sources"

Awesome, Justin. However, even just to 3 or fewer decimal places - for what applications might we need this method? As you say, Google Earth does a good job. Are we contemplating situations where Google Earth is insufficiently accurate?

Are there scientific studies that demonstrate that courses with sep/drop >1m/km produce significantly faster times than courses with a drop of say, 0.9 m/km? The (apparent to me)absence of some rigorous scientific criteria on which to base the drop/sep number indicates that for a situation like Dave Katz's, we could consider modifying the criterion instead of finding the exact measurement. For instance, why not a criterion such as "1m/km plus or minus 5%"?
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