Ascent calculation error

Ishi
Registered Users Posts: 34 
Master Explorer

Master Explorer
Hello
Have a look at this run: https://mysports.tomtom.com/service/webapi/v2/activity/perm_Udp_6m6_-SlhviR-X2sAXP12xWkqMBUbNgFII5EmOK0igWrPfszNvJwn2b4xAoAo9EDe--CpG2BTguxiMJuWqg?format=html
5 km uphill: almost continuously and then down
Starting elevation was at 927 m, highest was 1244 m but report shows an ascent of 899m!
Doesn't make sense
Thanks for any thoughts/info
Have a look at this run: https://mysports.tomtom.com/service/webapi/v2/activity/perm_Udp_6m6_-SlhviR-X2sAXP12xWkqMBUbNgFII5EmOK0igWrPfszNvJwn2b4xAoAo9EDe--CpG2BTguxiMJuWqg?format=html
5 km uphill: almost continuously and then down
Starting elevation was at 927 m, highest was 1244 m but report shows an ascent of 899m!
Doesn't make sense
Thanks for any thoughts/info
0
Comments
-
Ascent is cumulative, including all ascent, not just from the highest point to the lowest point. If you go up 5 meters and then down 5 meters, you had 5 meters of ascent, even though you are at the same elevation you started at. Even on a straight incline there will be small ups and downs it detects (and I see plenty of them in your graph) which add up over time. Plus GPs is only accurate to within 15-20m of your true location so it is picking up points below you and above you, adding to the elevation gain. This is the nature of the technology, it is showing your relative position and estimated ascent totals.
I hope this helped answer your question. If so, please mark it as a solution so others can look for it if they have the same question.0 -
I did notice the small ups and downs, however, how can they be twice the net gain in elevation? I think the fact that it is picking up points next to me (as this was a road on a hillside) made the inaccuracies
Thanks anyway0 -
Ishi wrote:I did notice the small ups and downs, however, how can they be twice the net gain in elevation? I think the fact that it is picking up points next to me (as this was a road on a hillside) made the inaccuracies
Thanks anyway
I hope this helped answer your question. If so, please mark it as a solution so others can look for it if they have the same question.0