private static void GetPermalinkLayers()
        {
            string layers;

            try { layers = HtmlPage.Document.QueryString["layers"]; }
            catch (KeyNotFoundException) { return; }

            if (!layers.Equals(""))
            {
                _layerlist = layers.Split(',');
                if (_layerlist.Length == 0) return;

                imageRequest = new ImageRequests(Constants.BaseApiUrl);
                imageRequest.ImageRequestReceived += imageRequest_ImageRequestReceived;
                imageRequest.GetAllImagery();
            }
        }