title: Bing Map on Windows Phone 8.1
body: <p>I'm trying to change the viewport of a map within a Windows phone 8.1 app. I have to set the center (that it works) and the lowerLeft/upperRight coordinates to set the bounds of the map, but I have just the ZoomLevel property that can't help me to set the bounds of the map with precision.</p>
  
  <p>This is what I have:</p>
  
  <p><strong>XAML</strong></p>
  
  <pre><code>xmlns:Maps="using:Windows.UI.Xaml.Controls.Maps"
  ...
  &lt;Maps:MapControl x:Name="myMap" MapServiceToken="&lt;token&gt;"/&gt;
  </code></pre>
  
  <p><strong>CODE</strong></p>
  
  <pre><code>this.myMap.Center = new Geopoint(new BasicGeoposition() { Latitude = 46.85, Longitude = 8.94});
  </code></pre>
  
  <p>Now I want to set the upperRight and lowerLeft corner to set the bounds. I saw this article <a href="http://social.technet.microsoft.com/wiki/contents/articles/24124.windows-phone-8-map-control-how-to-get-map-bounds-area-c-xaml.aspx" rel="nofollow">HERE</a> but it doesn't work for me.. the <code>ConvertGeoCoordinateToViewportPoint</code> doesn't exist with the namespace <code>Windows.UI.Xaml.Controls.Maps</code> and I don't know why.</p>
  
  <p>Thank you.</p>