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GPS not accurate

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‎03-21-2021 11:40

‎03-21-2021 11:40

The distance recorded by the GPS on my Sense is not correct! When I register my activity apart on Strava from my phone and check it on Google Maps I have about the same distance which is correct, but the distance recorded by my Sense is always much lower!!

Even worse, after synchronizing my activity on the would-be-Strava app, and after adding my wife who was doing the activity with me, she doesn't even have the same figures as me on strava... Whereas the data comes from my watch, so Strava re-calculates the distance correctly from my watch data, and my watch is not even able to do it!

Unacceptable and must be corrected otherwise I will no longer use my watch GPS, and so my watch at all!!! 

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3 REPLIES 3

‎03-22-2021 01:55

‎03-22-2021 01:55

@Manu137 I have a different experience.  I find the Sense GPS quite good.  If I track a walk using MapMyWalk on my iPhone, using the iPhone GPS, and at the same time use the Sense walk function and hence the Sense GPS to track the walk I usually get agreement within  20m in 4km. Which I think is good, particularly considering the general accuracy of GPS.  Both MapMyWalk and Sense distances are within the same 20m or so of the distance I get if I plot the walk on Google Maps.

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‎03-24-2021 14:17

In response to CBV2

‎03-24-2021 14:17

Ok, so what do you think of distances calculated on Google Maps? And how do you explain that the old speedometer/distance calculator that I re-installed on my bike to check where the bug comes from give me a similar distance like Strava and Google Maps? There is only one device that does not give the same result as all the others, so it is necessarily the wrong one, and this device is the Sense GPS.

And on a small distance of about 4kms which I am able to draw on Maps and to track on different devices, if my Sense tells me that the distance was only 3kms, I have no problem identifying that the Sense is wrong, and not just a bit wrong, but 25% wrong which is unacceptable 

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‎03-24-2021 16:31

In response to Manu137

‎03-24-2021 16:31

The distances on Google Maps are as accurate as the mapping interval that is used.  Short of paying a surveyor to survey the route Google Maps is my reference point, and as I said a couple of days ago I get good agreement between the Sense and Google Maps, and the iPhone/MapMyWalk app.  If you are getting a 25% difference then clearly something is wrong.  Are you getting continuous GPS coverage?  GPS is notorious for dropping out under overhead cover, including tree cover.  My walks are mostly in the open so I don't get any problem but I have read other comments saying that GPS drops out under tree cover.

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