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Author Topic: TGP 1.6.10 distance difference when saving as GPX  (Read 908 times)

ch0wn

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TGP 1.6.10 distance difference when saving as GPX
« on: April 04, 2013, 10:16:38 pm »

Hi,

Has anyone noticed that? Is it a known issue?
It is a small difference, but it's there.
Ie: today one of my workouts was 6.775KM . When I save it via TGP, the file created has 6.83KM.

It did happen to almost all workouts I had so far.
Any clues?

Thanks in advance.
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GS_TECH01

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Re: TGP 1.6.10 distance difference when saving as GPX
« Reply #1 on: April 07, 2013, 10:14:28 pm »

Dear

Can you provide your product model ??
That will help us to solve your problems as soon as possible~

Thank you and have a nice day :)

Best Regards,
Angela
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ch0wn

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Re: TGP 1.6.10 distance difference when saving as GPX
« Reply #2 on: April 14, 2013, 08:30:59 pm »

Hi,

Sorry for the late reply!
I have a GH-625XT.

I'm wondering because despite there's a difference, if I check via google maps exactly the same route/path, the GPX created matches the distance!
In other words: in the watch and in TGP, the distance is a little bit shorter than GPX created, as well as google maps track created manually!

Today I ran 10.12K . GPX reports so, but watch and TGP report 10.02K, which means, 100 meters less.
If I take this workout (as I did) and save as GPX, I'll get "proper" result.

Regards
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gerhard

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Re: TGP 1.6.10 distance difference when saving as GPX
« Reply #3 on: April 15, 2013, 04:31:06 pm »

I'm wondering because despite there's a difference, if I check via google maps exactly the same route/path, the GPX created matches the distance!
In other words: in the watch and in TGP, the distance is a little bit shorter than GPX created, as well as google maps track created manually!

Today I ran 10.12K . GPX reports so, but watch and TGP report 10.02K, which means, 100 meters less.
If I take this workout (as I did) and save as GPX, I'll get "proper" result.

There are many ways to measure distance. An explanation for SportTracks and the biggest competitor, that is mostly applicable for Globalsat and TGP.
http://www.zonefivesoftware.com/sporttracks/forums/viewtopic.php?f=42&t=6651
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ch0wn

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Re: TGP 1.6.10 distance difference when saving as GPX
« Reply #4 on: April 15, 2013, 04:52:53 pm »

Hi gerhard,

Thanks for the link, very useful!
However, it does not make sense for me yet.
Since both data (TGP data and GPX file) came from the same source, I don't understand why they're different.

I understand that the watch itself may use other variables to calculate distance, but then all data is sent to TGP.
Therefore, TGP has all information, and it shows as the watch does.

Afterwards, when you save the data as GPX, you get the difference.

That's unclear for me.

Even creating a straight route in google maps (which means, no deviation in the same street) is larger than the distance reported in the watch. It should be the other way around, shouldn't it? Considering that with GPS we have more deviation..

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GS_TECH01

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Re: TGP 1.6.10 distance difference when saving as GPX
« Reply #5 on: April 16, 2013, 03:36:42 am »

Dear Ch0wn

After you save data as GPX then how you open GPX file ??  via TGP or Google map or any tool ??
if you open your GPX file via TGP,distance will be different ??

Thank you and have a nice day :)
 
Best Regards,
Angela
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GS_TECH01

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Re: TGP 1.6.10 distance difference when saving as GPX
« Reply #6 on: April 16, 2013, 03:38:22 am »

Dear Gerhard,

Thank you for your help :)

Have a nice day~~

Best Regards,
Angela
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ch0wn

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Re: TGP 1.6.10 distance difference when saving as GPX
« Reply #7 on: April 16, 2013, 09:57:27 am »

Dear Ch0wn

After you save data as GPX then how you open GPX file ??  via TGP or Google map or any tool ??
if you open your GPX file via TGP,distance will be different ??

Thank you and have a nice day :)
 
Best Regards,
Angela



Angela,

Yes, I do open it with external tools: TCX Converter for instance.
I didn't try to open GPX with TGP itself. I'll try it this evening, and then I'll let you know.

Regards

Update: Saved GPX and then open the same file with TGP. It reported the same distance.
External tool still reports a little bit longer.
« Last Edit: April 16, 2013, 10:30:09 pm by ch0wn »
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