protected override System.Drawing.Bitmap GetMapCore(GetMapRequest getMapRequest, MapConfiguration cachedMapConfiguration, System.Web.HttpContext context) { MultiGeoRasterLayer.BuildReferenceFile(@"..\..\Data\referenceFile.txt", CustomParameter); MultiGeoRasterLayer multiGeoRasterLayer = new MultiGeoRasterLayer(@"..\..\Data\referenceFile.txt"); cachedMapConfiguration = new MapConfiguration(); cachedMapConfiguration.Layers.Add("MultiGeoRasterLayer", MultiGeoRasterLayer); return base.GetMapCore(getMapRequest, cachedMapConfiguration, context); }