[jira] [Created] (CB-13604) Returned location coordinates are very inaccurate after requesting location for a period of time while not connected to wifi

["Remi Boardman (JIRA)" <ji...@apache.org>]

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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