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  • I second the status update question asked by Julius.  We are all dying for this enhancement.  100% elevation errors is very frustrating.  Thank you in advance.

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  • I have receiveid reply from Strava (to my personal ticket) regarding usage of iPhone barometric sensor data:

    We don't currently use the barometric sensor in the new iPhones because it was not accurate enough. Please let me know if you have any other questions

    They must be kidding. I don't think any sensor can be less accurate than currently used method. I get ~200m elevation difference compared to Garmin on my 50km ride. Pretty sad.

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  • From what I have read, the barometer is quite accurate.
    For example:
    http://www.extremestorms.com/iphone_6_barometer.htm

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  • We don't currently use the barometric sensor in the new iPhones because it was not accurate enough. Please let me know if you have any other questions

    "They must be kidding. I don't think any sensor can be less accurate than currently used method. "

     

    What they probably meant to say was "In the limited testing we did in unmountianous regions where we happen to be, the iPhone's barometric altimeter was not as accurate as our elevation database, which we fill in from after throwing away the track's elevation data. The barometric elevation data is indeed more accurate than the GPS elevation, but not better (in our small and wholly insufficient testing) than our elevation database, so not good enough for us to not override it the way we don't override other barometric units."

    That's my guess, at least. Where I ride (the mountains of Kyoto, Japan), their elevation database is laughably incorrect, so the iPhone barometric altimeter would be a welcome step up. IIRC, the "Runmeter" (AKA "Cyclemeter") app lets you use the iPhone's barometric altimeter, though I don't know whether Strava then respects it or overrides it.

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  • Strava say the app is collecting iPhone barometric sensor data, but not using it in calculating elevation.

    I hope they will start using it one day. Better sooner than later.

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  • I couldn't agree more Julius, Matt, & Jeffrey.  The single biggest reason to recommend CycleMeter Pro over Strava is that they implemented the barometric option as soon as the iPhone 6 came out. With every new update of the Strava app, I look for the barometric enhancement and after two years feel like Strava no longer listens to their customers.   There are way too many people like me who regularly have 100% error (double the actual) in total elevation calculation (climbing up a smooth 6% incline has a sawtooth profile with iPhone GPS and perfectly smooth and accurate with CycleMeter Pro.  And when you import CycleMeter Pro into Strava it recalculates elevation with the horribly inaccurate mapped solution.  Strava, give us the option to use barometric.  Take a look at this profile https://www.strava.com/activities/715688160 which shows the sawtooth pattern and compare it to a Garmin rider on the same Newport Coast segment and it is a perfectly smooth incline.  

      Thank you in advance for looking into this again.  

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  • "We don't currently use the barometric sensor in the new iPhones because it was not accurate enough. Please let me know if you have any other questions"

    As a software developer who does some work with merging multiple sensor sources to improve nav data I'd say it's highly unlikely that the data would not be helpful at all even in good scenarios for the elevation maps. I'm not sure what sort of algorithm you use now but I'd recommend something like a Kalman Filter where you can include a uncertainty on your data inputs. Using one I have found it is rare that for data inputs with well understood error (like the iphones barometer) that more inputs does not improve nav solutions. And judging by some of the above posts there's a lot of room for improvement.

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  • I was shocked to see as of December 20th 2016, Strava appears to have fixed the elevation error with the iPhone app, at least for the area I ride.  In the past, barometric based devices such as Garmin were far more accurate than the iPhone Strava app (Strava does not use the barometric iPhone feature that first arrived with the iPhone 6 and instead relies on map data.)  In the area I ride Newport Coast in Orange County California, the accuracy is usually off by 50-100 % (actual elevation might be 3K feet and the iPhone app reported 4.5K-6K).

    As of Dec 19/20 2016, my Newport Coast rides show a perfectly smooth profile (similar to a barometric ride) for a steady incline instead of the old saw-toothed profile on a steady climb and also shows accurate total elevation gained.  I suspect the mapping data was fixed and the iPhone app is still not using barometric but that's fine if the mapping data is fixed.   The release notes for that Strava 5.9.0 release on Dec 20th, 2016 state "bug fixes" and this is much bigger than a bug fix IMO.  Anyone else notice this?

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  • Bruce, what you're seeing is likely due to this:

     

    https://support.strava.com/hc/en-us/articles/115000024864-Announcing-Strava-s-Elevation-Basemap

    "Now, we have a new elevation look-up service powered by data from the Strava community."

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  • It's frustrating to lose a feature by "upgrading" from the built-in workout app to Strava Premium on my iPhone.

    I was told that they aren't using the barometric sensor bc not all iPhones have it. I'm an iOS developer and I can tell you, it's trivial to do feature detection at runtime (turn it on for phones that support it!)

    This is just ridiculous- the sensor was introduce over 2.5 years ago.

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  • The workaround to Strava's laziness is to use a 3rd party .gpx logging app, and then edit the .gpx creator field before uploading to strava as follows:

    Change: 

    creator="Ultra GPS Logger"

    to 

    creator="Ultra GPS Logger with barometer"

    Strava will then keep the barometer data for your activity rather than ruining it with their rubbish elevation correction data.

    Strava: Please spend 5 minutes at the keyboard and give us the option to use barometric data in your android/iphone app! 

     

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  • Using the barometric altimeter on the iPhone would make Strava my favourite sports app + gadget replacement! It's just frustrating to see the full potential not being tapped. This would be a win-win situation: Broader refinement of the "elevation look-up serveice" as well as quality elevation data in activities for users of "recent" iPhones.

    Hope it will be implemented soon!

     

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