protected override void OnManipulationStarted(ManipulationStartedEventArgs e)
{
base.OnManipulationStarted(e);
//if (this.Action != null)
//{
// this.Action.OnManipulationStarted(e);
//}
_center = this.TransformToVisual(layerCollectionContainer).Transform(e.ManipulationOrigin);
_centerP = this.ScreenToMap(_center);
}