/// <summary>
/// Applies the Stretch colorizer to the basic raster layer.
/// </summary>
/// <param name="basicRasterLayer">The basic raster layer is either a raster or image service layer, or the image sub-layer of the mosaic layer.</param>
/// <returns></returns>
public static async Task SetToStretchColorizer(BasicRasterLayer basicRasterLayer)
{
// Defines parameters in colorizer definition.
int bandIndex = 0;
RasterStretchType stretchType = RasterStretchType.MinimumMaximum;
double gamma = 2.0;
string colorRampStyle = "ArcGIS Colors";
string colorRampName = "Aspect";
await QueuedTask.Run(async() =>
{
// Gets a color ramp from a style.
IList <ColorRampStyleItem> rampList = GetColorRampsFromStyleAsync(Project.Current, colorRampStyle, colorRampName);
CIMColorRamp colorRamp = rampList[0].ColorRamp;
// Creates a new Stretch Colorizer Definition with defined parameters.
StretchColorizerDefinition stretchColorizerDef = new StretchColorizerDefinition(bandIndex, stretchType, gamma, colorRamp);
// Creates a new stretch colorizer using the colorizer definition created above.
CIMRasterStretchColorizer newColorizer = await basicRasterLayer.CreateColorizerAsync(stretchColorizerDef) as CIMRasterStretchColorizer;
// Sets the newly created colorizer on the layer.
basicRasterLayer.SetColorizer(newColorizer);
});
}
public static async Task DisplayRasterAsync(Uri rasterUri, string displayName, int transparency)
{
// parse the uri for the folder and file
string strFileName = null;
string strFolderPath = null;
if (rasterUri.IsFile)
{
strFileName = System.IO.Path.GetFileName(rasterUri.LocalPath);
strFolderPath = System.IO.Path.GetDirectoryName(rasterUri.LocalPath);
}
await QueuedTask.Run(() =>
{
RasterDataset rDataset = null;
// Opens a file geodatabase. This will open the geodatabase if the folder exists and contains a valid geodatabase.
using (Geodatabase geodatabase =
new Geodatabase(new FileGeodatabaseConnectionPath(new Uri(strFolderPath))))
{
// Use the geodatabase.
try
{
rDataset = geodatabase.OpenDataset <RasterDataset>(strFileName);
}
catch (GeodatabaseTableException e)
{
Debug.WriteLine("DisplayRasterAsync: Unable to open raster " + strFileName);
Debug.WriteLine("DisplayRasterAsync: " + e.Message);
return;
}
}
// Create a new colorizer definition using default constructor.
StretchColorizerDefinition stretchColorizerDef = new StretchColorizerDefinition();
RasterLayer rasterLayer = (RasterLayer)LayerFactory.Instance.CreateLayer(rasterUri, MapView.Active.Map);
if (rasterLayer != null)
{
rasterLayer.SetTransparency(transparency);
rasterLayer.SetName(displayName);
}
});
}
