How do you implement third dimension in maps?

iOS
[assembly: ExportRenderer(typeof(Map3d), typeof(MapView3dRenderer))]
namespace MyApp.iOS.Renderers
{
public class MapView3dRenderer : MapRenderer
{
MKMapView _nativeMap;

    protected override void OnElementChanged(ElementChangedEventArgs<View> e)
    {
        base.OnElementChanged(e);
        if (e.NewElement != null && Control != null)
        {
            _nativeMap = Control as MKMapView;
        }
    }
    protected override void OnElementPropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
    {
        base.OnElementPropertyChanged(sender, e);
        if (_nativeMap == null)
            return;
        if (e.PropertyName == "VisibleRegion")
            UpdateCameraView();
    }
    void UpdateCameraView()
    {
        var target = new CLLocationCoordinate2D(50.890119f, 5.857798f);
        //Enable 3D buildings
        _nativeMap.ShowsBuildings = true;
        _nativeMap.PitchEnabled = true;
        // Attach the camera
        var camera = MKMapCamera.CameraLookingAtCenterCoordinate(target, 650, 60, 0);
        _nativeMap.Camera = camera;
    }
}

}

Android
// Create the camera
CameraPosition cameraPosition = new CameraPosition.Builder()
.Target(location)
.Tilt(45)
.Zoom(10)
.Bearing(0)
.Build();
// Convert to an update object
CameraUpdate cameraUpdate = CameraUpdateFactory.NewCameraPosition(cameraPosition);

// Attach the camera
map.MoveCamera(cameraUpdate); // map is of type GoogleMap