Hello,
Since some time I’m using kurviger pro and kurviger.de after trying several other apps and planning combinations and I do like it very much.
Unfortunately I have a navigation problem which tracks me and my bike offroute, mainly after curves, crossings or stops (without stopping the app).
As you can see on the screenshot and a visualization of the track my phone (or the app) looses the real position and tracks me in a straight direction away from my last position. After some time the position is found again and I’m back on track.
If I understand functionality of the gpx track right, the app gets a gps position which slowly moves through the neighborhood of the last known position.
Is this because my GPS signal is bad? Is the a kind of heuristic if the signal is lost? But the app looks like the signal is good. Also a GPS test app I tried seemed to be satisfied with the signal.
Sometimes I had the feeling there might be an issue with the compass, because the arrow is positioned crosswise to the direction of the street, but the compass of the device is calibrated.
Device: Samsung Galaxy S5mini in offline mode
Many thanks in advance for any help.
the phone is mounted on the handlebar, so normaly there should not be a problem with the the GPS quality. But without knowing much about gpx tracks and the GPS accuracy I recognized, that hdop in the file mostly is 48 if I’m offroute and 24 or 32 if I’m onroute.
The phone is always on if I’m using kurviger.
currently the location service is android
the kalman filter is already in use.
On my next tour I’m
going to check the google location service
try another phone
track via OSMant and see if there is the same behaviour.
Any other option I may try? What about “Geglättete Bewegung” (smoothed movement?)
What normally happens if the GPS signal is lost / is bad? Is the described behaviour the behaviour I have to expect?
I have checked the “Standortgenauigkeit” (position accuracy?). But I did not recognize a difference if I’m offroute. How a bad GPS signal would be displayed?
Do you have any idea why the route normally ist lost after curves?
Sorry for asking “holes in the stomach”.
You can try different options, like another location service and/or disable Kalman filter.
(smooth movement is for display purposes, it does not affect GPS quality)
Location accuracy circle is visible when is big and map is in large zoom to show it.
When GPS is lost there is no GPS location data for apps to process,
so jumps and straight lines appear in track recording and navigation.
Hello,
today I tried a route with different parameter settings and logged the GPS data with the app.
Do not really know if it may help somebody, but here are the tracks:
Used device: Samsung Galaxy S5mini. Internet by bluetooth tethering.
The phone is loaded via USB. Mounted on handlebar and display is on.
All tracks were recorded sequentially. I tried to ride all tracks in the same manner, but I was not the only one on the road.
So by unchecking Kalman filter I get better routing results. Using different location services are more or less irrelevant. For me it sounds interesting, that I get better results when I do no routing and switch off the display, even if the kalman filter is checked. The A3 phone is newer and has a better performance.
May the problems founded on performance issues?
Have you tried, to switch the phone off?
Don’t just restart, but switch off S5 mini, then start it up again!
Have you checked that the cover for the smartphone, or the mounting kit does not disturb the GPS signal?
First let me say your support is awesome. I never thought to get so many tips in so short time. Thanks.
Also thanks to devemux86 for trusting I may understand the description of the kalman filter
Yes the phone was restarted several times. I do have the behaviour since longer times.
Also it should be not because of disturbance because there is no cover, and the display is at fresh air, the mount is of pure plastic and the Galaxy A3 works.
Is there any possibility to save performance? I still have the feeling, that the behaviour is the result of an performance issue.
ich lese immer etwas von Kalman Filter die ich in Apps aktivieren kann. Leider werde ich aus den Englischen Beiträgen und Erklärungen im Netz nicht schlau. Kann mir jemand in einfachen Worten erklären was der Kalman Filter macht und ob es sinnvoll ist diese Funktion zu aktivieren.