Differences
This shows you the differences between two versions of the page.
Both sides previous revisionPrevious revisionNext revision | Previous revisionNext revisionBoth sides next revision | ||
en:help:v2:tracker [2020/08/15 12:23] – [How to start recording a track?] alpinequest | en:help:v2:tracker [2021/09/07 11:11] – [Recorded track doesn't precisely follow my real locations] alpinequest | ||
---|---|---|---|
Line 171: | Line 171: | ||
===== Problems with the track recorder ===== | ===== Problems with the track recorder ===== | ||
{{ : | {{ : | ||
+ | |||
+ | Most (if not all) of the tracking problems are due to the battery optimisations made by the Android system itself. Commonly, the GPS is disabled when the screen is turned off, or background applications are killed after some delay. | ||
+ | |||
+ | You need to correctly setup your device and be sure that: | ||
+ | * The application (it's tracking service) is not stopped by the system after some time; | ||
+ | * The GPS remains available to applications even if the screen is turned off. | ||
+ | |||
+ | There are usually only a few settings to change (see above section [[en: | ||
+ | |||
+ | {{: | ||
+ | |||
+ | \\ | ||
==== Track not correctly recorded when the screen is turned off ==== | ==== Track not correctly recorded when the screen is turned off ==== | ||
- | On top of the Android battery optimization tools, some brands also include their own tools that may disable the use of GPS or network for background applications, | + | On top of the Android battery optimization tools (see above section [[en: |
For example, you can check that the application is allowed to access to your GPS location even when the device is not used (screen off) as you can see on the right. | For example, you can check that the application is allowed to access to your GPS location even when the device is not used (screen off) as you can see on the right. | ||
Line 206: | Line 218: | ||
For some devices (like Huawei Mate 10), a system update can also fix this problem. | For some devices (like Huawei Mate 10), a system update can also fix this problem. | ||
+ | |||
+ | {{: | ||
==== The track recorder service stops ==== | ==== The track recorder service stops ==== | ||
Line 217: | Line 231: | ||
==== Recorded track doesn' | ==== Recorded track doesn' | ||
- | Some devices perform better than others when using the GPS, depending on the quality of the hardware used and the internal conception (placement of the GPS chip inside the device). Some devices require a stronger GPS signal to give an acceptable accuracy. For example, here is the same track recorded at the same time by two different devices (one in the left pocket, one in the right) during a small outside walk with occasional stays inside buildings. We can see that the Samsung Galaxy S9 {{: | + | Some devices perform better than others when using the GPS, depending on the quality of the hardware used and the internal conception (placement of the GPS chip inside the device). Some devices require a stronger GPS signal to give an acceptable accuracy. For example, here is the same track recorded at the same time by two different devices (one in the left pocket, one in the right) during a small outside walk with occasional stays inside buildings. We can see that the Samsung Galaxy S9 {{: |
{{ : | {{ : |