WPF Binding ZoomLevel и центр в элементе управления BingMaps

Question

Мне нужна помощь, как сделать привязку к ZoomLevel Property и Center Property?Я смог сделать привязку для PushPins, но ZoomLevel и Center я не знаю, как связывать Спасибо!

<UserControl x:Class="AppGST.BingMaps"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
         xmlns:local="clr-namespace:AppGST"
          xmlns:map="clr-namespace:Microsoft.Maps.MapControl.WPF;assembly=Microsoft.Maps.MapControl.WPF"
         mc:Ignorable="d" 
         d:DesignHeight="628" d:DesignWidth="800">
<UserControl.Resources>
    <DataTemplate x:Key="MapTemplate">
        <map:Pushpin map:MapLayer.Position="{Binding Location}"/>
    </DataTemplate>
</UserControl.Resources>

<Grid>
        <map:Map Height="628" 
                   CredentialsProvider="{StaticResource Key}"
                   ZoomLevel="2"
                   Mode="Road"
                   Name="WorldMap">

            <map:MapItemsControl ItemsSource="{Binding PinsLocations}" ItemTemplate="{StaticResource MapTemplate}"/>
            </map:Map>
</Grid>

Класс ViewModel

public class BingMapsViewModel : ObserverableObject, IPageViewModel
{
    private ObservableCollection<MapModel> _pinsLocations;

    public ObservableCollection<MapModel> PinsLocations
    {
        get { return _pinsLocations; }
        set
        {
            _pinsLocations= value;
            OnPropertyChanged();

        }
    }
    public BingMapsViewModel()
    {
        GSTService.GetRecentLocationDataForGST((o, ea) =>
        {
            GSTLocations = new ObservableCollection<MapModel>(ea.Locations);
        });
    }
}

public class GSTService
{
    public static void GetRecentLocationDataForGST(EventHandler<GSTLocationsEventArgs> callback)
    {
        List<MapModel> data = new List<MapModel>();
        data.Add(new MapModel { Location = new Location(32.021944, 34.757732), ZoomLevel = 18 });
        data.Add(new MapModel { Location = new Location(43.273558, 76.914842), ZoomLevel = 18 });
        data.Add(new MapModel { Location = new Location(55.753215, 37.622504), ZoomLevel = 18 });
        callback(null, new GSTLocationsEventArgs(data));
    }
}

public class GSTLocationsEventArgs: EventArgs
{
    public List<MapModel> Locations { get; set; }
    public GSTLocationsEventArgs(List<MapModel>locations)
    {
        Locations = locations;
    }
}

Открытый класс модели MapModel: ObserverableObject {private Location _location;private double_zoomLevel;

    public double ZoomLevel { get; set; }
    public Location Location { get; set; }
}