The problem about windows phone8, thank you

[platform]Nokia Lumia 820
[]wifi test environment, data networks, positioning open
[both] "comparison of Here map" and "my own program"
[method] the same place, still not the East, by two positioning procedures were located and screenshots
[Here Map Locator.

[program] positioning of my own.

Here map indicating the position is true of my own, and my own program indicates there are a lot of errors.
What is my program written in a problem, or the location service for these calls itself as Nokia high precision? But the error is too big.?

private GeoCoordinateWatcher watcher;
void StartTracking()
watcher = new GeoCoordinateWatcher(GeoPositionAccuracy.High);

watcher.StatusChanged += new EventHandler<GeoPositionStatusChangedEventArgs>(watcher_StatusChanged);

watcher.PositionChanged += new EventHandler<GeoPositionChangedEventArgs<GeoCoordinate>>(watcher_PositionChanged);


void watcher_StatusChanged(object sender, GeoPositionStatusChangedEventArgs e)
Deployment.Current.Dispatcher.BeginInvoke(() => MyStatusChanged(e));

void MyStatusChanged(GeoPositionStatusChangedEventArgs e)
switch (e.Status)
case GeoPositionStatus.Disabled:

case GeoPositionStatus.Initializing:

case GeoPositionStatus.NoData:

case GeoPositionStatus.Ready:

void watcher_PositionChanged(object sender, GeoPositionChangedEventArgs<GeoCoordinate> e)
Deployment.Current.Dispatcher.BeginInvoke(() => MyPositionChanged(e));

void MyPositionChanged(GeoPositionChangedEventArgs<GeoCoordinate> e)
var coord = new GeoCoordinate(e.Position.Location.Latitude, e.Position.Location.Longitude);
mapWithMyLocation.Center = coord;

If in accordance with the above MSDN
And my program. The result is the same, is not allowed.

So, I want to know, here is what MAP calls the map service? And Nokia is one thing you?
If not, how to call Nokia map.?

Started by Ryan at February 04, 2016 - 6:41 PM

WP8 on the map is Nokia map.

The map has offset is not what secret.

Posted by Murray at February 19, 2016 - 7:15 PM

The results why here map out is accurate.?

Posted by Ryan at February 21, 2016 - 7:20 PM

The results why here map out is accurate.?

Posted by Ryan at November 26, 2016 - 2:42 PM

The results why here map out is accurate.?

Posted by Ryan at December 10, 2016 - 3:26 PM

I only know the here map location is very good, ,

A test machine, no SIM card, by the WiFi network, it can be accurate to approximately 10 meters

While the other map,, in the case of WiFi fast partial 1 kilometers.

Posted by Rita at December 20, 2016 - 4:26 PM

Here from what I know is a special algorithm, grab road is certainly a, but he at the same site users more better, I'm afraid there is adaptive algorithm in.

Posted by Paddy at December 28, 2016 - 5:11 PM

This problem is not solved?

Posted by Ryan at January 01, 2017 - 6:36 PM

These involve some commercial technology, I can't say too much.

Posted by Murray at January 08, 2017 - 5:40 PM

Oh, miserable. For God.

Posted by Ryan at January 13, 2017 - 6:37 PM