Related
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

altitude and altitude difference is differing on my Edge 1030 plus

PROFGRUEN
over 4 years ago

Dear all,

I detected during my last rides that my Edge 1030 Plus calculates the data field altitude difference not correctly:

on appx driven 100 altitude meters eg from 300 hm to 400 hm the data field altitude difference results in appx 5 hm more than the difference in altitude of starting and end point.

Has someone an idea how this inaccuracy in altitude difference measuring can be fixed?

Thank you in advance

ProfGruen

  • 0 over 4 years ago

    This should not happen, if your climb is always uphill - no bumps on plaine sections or short downhills intermittend.

    Elevation gain takes (so to speak) all ascents into account. If you ride in the plaine - no real elevation, but many bumps of a few meters up and down - you will get an elevation gain although you have not really gained any height.

    Maybe that is the solution...

  • 0 over 4 years ago in reply to mcinner1

    Thank you for your  feedback. It is clear that one may take only pure uphill as the calc otherwise doesnt work.

    However i will again test it on a longer uphill road and provide more information.

    Regards

    ProfGruen

  • 0 over 4 years ago

    5 meters out of 100 is a 5% difference.

    The altitude is determined using a barometer. Things like changes in weather/temperature can cause it to change outside of just changes in elevation.

  • 0 over 4 years ago in reply to dpawlyk

    You are right that this can also be a cause.
    But I thought ProfGruen meant the difference between the two Edge data fields "Elevation" (at the beginning and at the end) and "Elevation gain". The error of the changing air pressure should not play a role here.

  • 0 over 4 years ago in reply to mcinner1

    The measured altitude at a specific location can be different due to changes in weather.

    There's also going to be variation in the numbers (repeatability).

    Estimating gain adds other errors.

  • 0 over 4 years ago in reply to dpawlyk

    Mcinner1 detailed the question correctly. I appreciate the hint or dpawlyk. However weather was stable and
    test distance was about 1000m with 200 altitude meters - without up and downs.

    So it seems at my Edge 1030 plus that the data fiels "sum of altitude meters" does not sum up 100% exactly the driven altitude meters.

  • 0 over 4 years ago in reply to PROFGRUEN

    So, you are talking about gain.

    How long was the ride?

    The barometric measurements have random noise/variation.

    It's possible that it's more accurate when you are going faster (the real changes will be bigger than the random variation).

    The gain is determined by accumulation the differences between many successive elevation measurements. There is variation in the horizontal distance and the vertical distance. This won't generally produce he same number as the difference between the altitude at the start and the end.  

     

    You with rarely (if ever) get the same number.

    5% is pretty close.

  • 0 over 4 years ago in reply to dpawlyk

    the time checkpoints was start and about 15 minutes after, altitude difference about 200 altitude meters

  • 0 over 4 years ago in reply to PROFGRUEN

    7 kilometers, maybe.

    5% is close.

    You might be expecting an unreasonable amount of repeatability.

  • 0 over 3 years ago in reply to mcinner1

    Dear all,

    I want to come back with this topic. It is a year since this post and I monitored the distance and altitude measurement of my Edge 1030 Plus closely. Despite all the discussions up to now the fact remains: on an average bike tour with eg 30 km and 1000 meter altitude gain the Edge 1030 has a deviation to the correct distance ans espacially altitude gain of about 20 % which is really a lot. I checked the trip data with Basecamp building the same tracks/routes afterwards and comparing the data.

    Even if I go straight up a long hill let's say with a gain of 1000 altitude meter and without up/downs I receive a deviation of about 15-20%. Question: if the barometer doesn't work precise - is it possible to change to a precise GPS based monitoring?

    I am no expert and just want to have fun (and precise data) with my Egde 1030 PLus (which is my 4. Garmin cycling computer up to now).

    Thank you in advance
    ProfGruen