The XOSS Climb includes Climb Recognition and Climb Categorization, in which the Climb Recognition uses a pattern recognition algorithm, the Climb Categorization is similar to how the UCI categorizes climbs but with some modifications.
We introduced the effect of high altitude on Climb, Climb Integral = Average Grade * Distance * Altitude Factor.
Determining Climb Categorization
A path can be categorized as a climb on XOSS if it meets the following criteria:
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The average gradient is at least 1.3%.
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The segment distance is at least 1000 meters.
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The Climb Integral is greater than 8,000.
Altitude Factor
At an altitude of 1,500 meters, the SaO2 (Oxygen Saturation) of a person with normal cardiorespiratory function is about 95%, and above this altitude is a physiologically high altitude. The lowest altitude at which a healthy human will experience high inversion usually occurs at altitudes above 2,100 to 2,500 meters.
Therefore, we define an impact factor of the average altitude dimension. The data with an average altitude of 1500 meters and below will not be corrected, and the correction above 1500 meters:
average altitude factor
k = O(1500) / O(h) = 251 / (299 - 4 / 125 * h);
Categorization
The categories are broken down as follows:
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Cat 4 8000 ~ 16000
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Cat 3 16000 ~ 32000
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Cat 2 32000 ~ 64000
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Cat 1 64000 ~ 80000
- HC (Hors Categorie) > 80000