Remi Boardman created CB-13604:
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Summary: Returned location coordinates are very inaccurate after
requesting location for a period of time while not connected to wifi
Key: CB-13604
URL: https://issues.apache.org/jira/browse/CB-13604
Project: Apache Cordova
Issue Type: Bug
Components: cordova-android, cordova-ios, cordova-plugin-geolocation
Affects Versions: 7.0.1
Environment: OS X 10.12.5
iOS 10.1.1 iPhone 6s
Android 7.0 Motorola G4
Ionic v1 (latest)
Reporter: Remi Boardman
Assignee: Joe Bowser
While requesting a location every 10 seconds using an interval, I consistently
see the accuracy of returned positions suddenly jump to several kilometers.
To debug this I saved the accuracy of each location request to an array and
each time I tested, the accuracy began at around 10-65 metres then jumped to
around 2km on Android and over 10km on iOS after around 6-7 minutes
consistently. The returned coordinates continue to be very innaccurate for
several minutes and then return to between 10-65 metres.
Here is a subset of the location accuracy array on iOS when the issue is
present:
{quote}
[
65,
65,
65,
65,
10079,
10079,
10079,
10079
]
{quote}
As far as I can tell, this issue is only present when the device is not
connected to a wifi network. I can reproduce this behaviour on both iOS and
Android, while inside and stationary, and while travelling on foot with line of
sight to the sky. I have ensured the app remains in the foreground while
testing and the device/screen is awake. I make no changes to the App or device
when the accuracy decreases.
I have tried with and without {{enableHighAccuracy}} enabled and the behaviour
does not change. I have {{maximumAge}} set to zero and a {{timeout}} of 10000
milliseconds.
I am using {{navigator.geolocation.getCurrentPosition}} for each request.
{{watchPosition}} does not suit my purpose because I am only updating the
database with returned coordinates every 10 seconds.
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