public override void LoadDetails(XmlNode node, KmlRoot owner)
        {
            base.LoadDetails(node, owner);

            foreach (XmlNode child in node.ChildNodes)
            {
                KmlFeature newChild = null;
                switch (child.Name)
                {
                    case "NetworkLink":
                        newChild = new KmlNetworkLink();
                        break;
                    case "Placemark":
                        newChild = new KmlPlacemark();
                        break;
                    case "PhotoOverlay":
                        newChild = new KmlPhotoOverlay();
                        break;
                    case "ScreenOverlay":
                        newChild = new KmlScreenOverlay();
                        break;
                    case "GroundOverlay":
                        newChild = new KmlGroundOverlay();
                        break;
                    case "Folder":
                        newChild = new KmlFolder();
                        break;
                    case "Document":
                        newChild = new KmlDocument();
                        break;
                }

                if (newChild != null)
                {
                    newChild.sky = this.sky;
                    newChild.LoadDetails(child, owner);
                    if (children == null)
                    {
                        children = new List<KmlFeature>();
                    }
                    children.Add(newChild);
                }
            }
        }
 public void AddGroundOverlay(KmlGroundOverlay overlay)
 {
     GroundOverlays.Add(overlay);
 }
        public void LoadDetails(XmlNode node)
        {
            foreach (XmlNode child in node.ChildNodes)
            {
                KmlFeature newChild = null;
                switch (child.Name)
                {
                    case "NetworkLink":
                        newChild = new KmlNetworkLink();
                        break;
                    case "Placemark":
                        newChild = new KmlPlacemark();
                        break;
                    case "PhotoOverlay":
                        newChild = new KmlPhotoOverlay();
                        break;
                    case "ScreenOverlay":
                        newChild = new KmlScreenOverlay();
                        break;
                    case "GroundOverlay":
                        newChild = new KmlGroundOverlay();
                        break;
                    case "Folder":
                        newChild = new KmlFolder();
                        break;
                    case "Document":
                        newChild = Document = new KmlDocument();
                        break;
                }

                if (newChild != null)
                {
                    newChild.sky = this.sky;
                    newChild.LoadDetails(child, this);

                    children.Add(newChild);
                }
            }

            lastUpdate = DateTime.Now;
        }