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brvier / ForRunners

The new repository is located here : https://gitlab.com/brvier/ForRunners
https://gitlab.com/brvier/ForRunners
GNU General Public License v3.0
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Pace and distance calculations. #66

Open sprnza opened 6 years ago

sprnza commented 6 years ago

Hi there! I try to analyze GPX tracks I exported from ForRunners. I use gpxpy and I definitely get differences in pace and distance calculations. Here is the gpx. gpxpy reports:

Name: Test Name
Start: 2018-02-25T03:57:35
End: 2018-02-25 05:03:33
Duration: 65.97 mins
Avg. pace: 5.09 mpk
Length: 12.97 km
Km: 1.0 Avg. pace: 5.16
Km: 2.0 Avg. pace: 4.82
Km: 3.0 Avg. pace: 4.92
Km: 4.0 Avg. pace: 5.29
Km: 5.0 Avg. pace: 4.97
Km: 6.0 Avg. pace: 4.95
Km: 7.0 Avg. pace: 5.08
Km: 8.0 Avg. pace: 4.76
Km: 9.0 Avg. pace: 5.33
Km: 10.0 Avg. pace: 5.26
Km: 11.0 Avg. pace: 4.76
Km: 12.0 Avg. pace: 5.13
Km: 13.0 Avg. pace: 5.67

ForRunners stats: summary, pace stats

What's a secret? How could I get the same results? Another android app in wich I used the imported GPX shows the same results as gpxpy does. Does ForRunners make mistake?

brvier commented 6 years ago

Due to low precision of some device's GPS, some rounding and filters are used. Exported GPX have full raw data without this filters. Not sure if gpxpy have filter too.

I need to investigate a bit more. Also which version of ForRunners did you use ?