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POLocation service returning previous coordinates on WP7
 

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    <p>I'm using the code from <a href="http://create.msdn.com/en-US/education/quickstarts/Developing_with_the_Windows_Phone_GPS_%28Location_Services%29" rel="nofollow">the official site</a>, and I am consistently seeing the same behavior on multiple test devices - instead of getting the current location of the device, it gets the previous location (up to 30 miles away, where I was an hour ago).</p> <pre><code> private void setupMaps() { watcher = new GeoCoordinateWatcher(GeoPositionAccuracy.High); watcher.MovementThreshold = 10.0f; watcher.StatusChanged += new EventHandler&lt;GeoPositionStatusChangedEventArgs&gt;(watcher_statusChanged); watcher.PositionChanged += new EventHandler&lt;GeoPositionChangedEventArgs&lt;GeoCoordinate&gt;&gt;(watcher_PositionChanged); new Thread(startLocServInBackground).Start(); } void startLocServInBackground() { watcher.TryStart(true, TimeSpan.FromSeconds(60)); } void watcher_statusChanged(object sender, GeoPositionStatusChangedEventArgs e) { switch (e.Status) { case GeoPositionStatus.Disabled: // The Location Service is disabled or unsupported. // Check to see if the user has disabled the location service. if (watcher.Permission == GeoPositionPermission.Denied) { // the user has disabled LocServ on their device. showMessage("Location is required but it is disabled. Turn it on in Settings"); } else { showMessage("Location is not functioning on this phone. Sorry, Crux cannot run"); } break; case GeoPositionStatus.Initializing: // The location service is initializing. LoadingInfo.Text = "finding location"; break; case GeoPositionStatus.NoData: // The Location Service is working, but it cannot get location data // due to poor signal fidelity (most likely) // this fired intermittently when data was coming back :/ //MessageBox.Show("Location data is not available."); break; case GeoPositionStatus.Ready: // The location service is working and is receiving location data. //statusTextBlock.Text = "Location data is available."; LoadingInfo.Text = "Location found"; // THIS FIRES AFTER POSITION CHANGED HAS STOPPED FIRING break; } } private void initPostPanel() { PostPanel.Visibility = Visibility.Visible; } void watcher_PositionChanged(object sender, GeoPositionChangedEventArgs&lt;GeoCoordinate&gt; e) { // update the textblock readouts. latitude = e.Position.Location.Latitude.ToString("0.0000000000"); longitude = e.Position.Location.Longitude.ToString("0.0000000000"); // THIS FIRES TWICE, BEFORE STATUS IS FIRED AS READY. THEN THIS DOESN'T CALL AGAIN } </code></pre> <p>What I would expect to have happen is to get a continuous series of calls to PositionChanged after StatusChanged is called with a Status of Ready. If the calls continued after Ready, I expect I would eventually get the correct coordinates - but it never calls after that point.</p> <p>This does not occur with the emulator, only on the actual device (making this extremely difficult to test - since it actually involves driving between each test!)</p> <p>I am running the source code from the tutorial as well, and it does roughly the same.</p> <p>Can anyone tell me more about the expected behavior here and how I get what I need - which is simply a set of coordinates for the device at the current location when the app is being used.</p>
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