This object is in archive!
Gradient (Delta Height/Delta Distance % +/-0) Axis Option for Track Info
Completed
When planning routes for me and my 5yr old the gradient can be more important than actual height so would like adding as an axis option in track charts (should be simple implementation).
I like this idea 
Hello Steve,
you imagine this like another Y axis option, when will be just +- gradient in metres (or percentage)? So you should for example set on left Y axis "altitude" and on right Y axis "gradient"?
Hello Steve,
you imagine this like another Y axis option, when will be just +- gradient in metres (or percentage)? So you should for example set on left Y axis "altitude" and on right Y axis "gradient"?
Absolutely - gradients are typically (europe) % where 100% is vertical and resolves `div-by-zero` (ie delta alt (non-zero)/ delta dist (zero)). +ve = ascent, -ve=descent. So, for a `closed circuit` path `0` should be in middle of vertical axis and ranged accordingly (I think most scalable gradients are < 40% (50%=45°)) I know this should be `inferrable` visually from alt/dist graphs bit much more informative if available as (another) plot. Was actually surprised it wasn`t alreasy in the list :) Thank you for your consideration
Absolutely - gradients are typically (europe) % where 100% is vertical and resolves `div-by-zero` (ie delta alt (non-zero)/ delta dist (zero)). +ve = ascent, -ve=descent. So, for a `closed circuit` path `0` should be in middle of vertical axis and ranged accordingly (I think most scalable gradients are < 40% (50%=45°)) I know this should be `inferrable` visually from alt/dist graphs bit much more informative if available as (another) plot. Was actually surprised it wasn`t alreasy in the list :) Thank you for your consideration
I would like such an option for the Y axis, +1 from my side.
But Steve, I have strong doubts regarding your definition of the gradient/slope in %. http://en.wikipedia.org/wiki/Slope Slope of a road/railway:
100% means 45° because slope = 100*tan(delta alt/delta dist)
I would like such an option for the Y axis, +1 from my side.
But Steve, I have strong doubts regarding your definition of the gradient/slope in %. http://en.wikipedia.org/wiki/Slope Slope of a road/railway:
100% means 45° because slope = 100*tan(delta alt/delta dist)
Did originally write % delta/delta for which 1:1 = 45° = 100% and is, I believe, the std for European traffic signs. The later post (100%=Vert) was a posit whereby nothing should be more than 100% of itself ;) (hate footballers giving `110% effort`!) Whatever, as long as `standard` and easily comprehensible (not sure about the `tan` in your delta/delta, shouldn`t that be tan(angle of inclination)?)
Did originally write % delta/delta for which 1:1 = 45° = 100% and is, I believe, the std for European traffic signs. The later post (100%=Vert) was a posit whereby nothing should be more than 100% of itself ;) (hate footballers giving `110% effort`!) Whatever, as long as `standard` and easily comprehensible (not sure about the `tan` in your delta/delta, shouldn`t that be tan(angle of inclination)?)
PS. bit cheeky but avail as a dashboard var would be bonus but don`t let that interfere with Y-Axis ;)
PS. bit cheeky but avail as a dashboard var would be bonus but don`t let that interfere with Y-Axis ;)
of course you`re right regarding tangens and angle. Having two things in mind at the same time produces such nonsense :)
of course you`re right regarding tangens and angle. Having two things in mind at the same time produces such nonsense :)
I would also like to see the gradient value on my dashboard. This would be a big help.
I would also like to see the gradient value on my dashboard. This would be a big help.
https://getsatisfaction.com/locus/top...
https://getsatisfaction.com/locus/top...
so something crazy like this? ;)
so something crazy like this? ;)
I`m a little concerned about the max peaks, but in general yes.
Please keep the dashboard value for the current gradient also in mind :-)
I`m a little concerned about the max peaks, but in general yes.
Please keep the dashboard value for the current gradient also in mind :-)
@Menion:
Is the gradient in the chart already filtered?
Anyway, the altitude changes are impressing as well and could be the reason for crazy gradient values.
How was the altitude filtered?
What was the source for altitude (GPS, barometer)?
@Menion:
Is the gradient in the chart already filtered?
Anyway, the altitude changes are impressing as well and could be the reason for crazy gradient values.
How was the altitude filtered?
What was the source for altitude (GPS, barometer)?
currently "slope" is added:
https://getsatisfaction.com/locus/top...
currently "slope" is added:
https://getsatisfaction.com/locus/top...
it`s on a raw unfiltered data. On altitude data recorded with pressure sensor it`s little bit better
except two crazy values. Gradient values in chart are not filtered
it`s on a raw unfiltered data. On altitude data recorded with pressure sensor it`s little bit better
except two crazy values. Gradient values in chart are not filtered
Replies have been locked on this page!