Logging activities: A question of trust

5 watchers
sprouty76
sprouty76
Jun 2012
1:30pm, 18 Jun 2012
2,935 posts
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sprouty76
Enjoyed this comment:

"Uploaded a ride today, strava showed my max speed as 29mph and average speed as 36mph."
JohnnyO
JohnnyO
Jun 2012
1:47pm, 18 Jun 2012
13,215 posts
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JohnnyO
I thought strava was a pissing contest for commuters.
Now I realise it is a pissing contest for deceitful commuters.

I will shun it.
GregP
GregP
Jun 2012
1:51pm, 18 Jun 2012
60,735 posts
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GregP
Great post Johnny.
GregP
GregP
Jun 2012
1:55pm, 18 Jun 2012
60,736 posts
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GregP
From Sprouto's link:

"we just started calculating our own distances based the raw GPS data instead of using Garmin's distance data which was causing other problems. Garmin's will be spot on because they use their own data interpretation. Our analysis does not always agree with Garmin's but we believe it to be just as accurate".

How the *ACTUAL* fack can it be 'just as accurate? Either one is right or the other is. My maximum speed yesterday was either 24.0 or 21.9. One number cannot be "just as accurate" as the other, surely?

Where's Glenners when we need him?
sprouty76
sprouty76
Jun 2012
1:57pm, 18 Jun 2012
2,936 posts
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sprouty76
They did say further down that they'd changed that back, but it's clear that some people are still reporting issues.

I suppose that quote could be ok if they were both incorrect, i.e. your actual speed was 23.95...
JohnnyO
JohnnyO
Jun 2012
2:07pm, 18 Jun 2012
13,217 posts
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JohnnyO
I can see the value of elevation data correction, I have some runs that I know to be virtually flat but the actual garmin calculates that I have climbed many hundreds of metres. I put this down to waving my arms around a lot.

Both Garmin Connect and Fetch will smooth this data after it is uploaded and compared to a map and give a more realistic elevation profile.

I dont think the same can be said of distance data though, and even if it were, it would work to shorten your plot rather than lengthen it.
BigChiefRunningBore
BigChiefRunningBore
Jun 2012
2:35pm, 18 Jun 2012
16,916 posts
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BigChiefRunningBore
I am thinking Depeche Mode
swittle
swittle
Jun 2012
2:37pm, 18 Jun 2012
18,095 posts
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swittle
*Pimp My Ride*, mayhap? ;)
sprouty76
sprouty76
Jun 2012
2:37pm, 18 Jun 2012
2,937 posts
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sprouty76
(Meant 22.95 in my earlier comment. Maths is hard)
GregP
GregP
Jun 2012
2:37pm, 18 Jun 2012
60,746 posts
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GregP
You mean 22.95, one assumes Sprouters?

About This Thread

Maintained by GregP
A sort of 'Why FetchEveryone is better than STRAVA' wire.
----

Last Sunday I cycled to church.

My Fetch log, which I trust beyond all possibility of doubt, tells me this:

17.07 miles, 1h19m46s, max speed 30.3mph

Garmin Connect, which one assumes is closest to the raw data, tells me this:

17.07 miles, 1h19m46s, max speec 30.3mph

This makes me very happy.

Now, gentle Fetchies, you may have seen or read or experienced strava recently, and been tempted, as I was, to 'dabble' and see whether it might be fun. strava taking data from the same source (my Garmin EDGE 800) tells me this.

17.1 miles, 1h20m48s, max speed 31.9mph

Interesting, eh?

Related Threads

  • garmin
  • gps
  • strava








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