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wiglenet / wigle-wifi-wardriving

Nethugging client for Android, from wigle.net
https://wigle.net
BSD 3-Clause "New" or "Revised" License
665 stars 206 forks source link

Run and Total Distance are off by a lot #496

Closed signout closed 1 year ago

signout commented 3 years ago

On my Nokia 8.1 the travelled distance seems to be wildly exaggerated. See the attached picture. I’m sure you can see that if I were doing that speed in an urban environment I would probably have been pulled over. 303279E6-CDF8-4BF5-9F44-1B9FB198E2E4

Theintrepid1 commented 2 years ago

Also having this issue. Doesn't seem to happen every time. Oneplus 8 running Lineage Os 18.1. Screenshot_20210908-150517_WiGLE_WiFi_Wardriving

signout commented 2 years ago

As far as I can see this is periodic, and often occurs when there is Beidou signal. I'll try to notice if that's always the case or if it might glonass or galileo as well.

rksh commented 2 years ago

if you could turn on "display route for run," you'll probably see some interesting behavior as well (big "jags" in the route lines). We've tried to get fixes working for this before, but ended up disabling them because the cure is sometimes worse than the disease: https://github.com/wiglenet/wigle-wifi-wardriving/blob/master/wiglewifiwardriving/src/main/java/net/wigle/wigleandroid/listener/GPSListener.java#L495

rksh commented 2 years ago

Note: GPS fidelity gets particularly bad in proximity to very tall skyscrapers (see web maps for distortion around Willis tower, Burj Khalifa, 1 World Trade Ctr.!)

rksh commented 2 years ago

here's a PR that'll help debug this by allowing you to view your routes, if you elect to log routes! https://github.com/wiglenet/wigle-wifi-wardriving/pull/502

pejacoby commented 1 year ago

Seeing the same issue on a Galaxy S9 (SM-G960U) running Android 10, One UI v2.5, Kernel 4.9.186-2290479, Build number QP1A.190711.020.G960USQU9FVB2.

Comparing to a Galaxy S7 (running Android 8), the Run Distance shown on the S9 can be 3 to 4 or more times as far on the same run. When tracking routes, the GPX files created show ACCURATE distance, matching the S7 within a few tenths or a mile or less. The GPX file distance is the same in the app, as well as when loading the GPX file into another app.

GPS settings in the Wigle app (v2.67) are the same

Test drives have been out in the wide open freeways, no downtowns or tall buildings. Screencaps and GPX files available upon request.

rksh commented 1 year ago

https://github.com/wiglenet/wigle-wifi-wardriving/pull/545 ok - distance will match route now! Unfortunately, we can't go back and fix your total distance, but this will get future distances right!