ImageDataSet.UndefinedValue Property
Gets or sets the cell value that should be interpreted as "no data".
Syntax
public UndefinedValue UndefinedValue { get; set; }Property Value
This property can only be modified before the dataset has been initialized. Attempting to modify it after initialization will cause an exception to be thrown.
Remarks
This property defines what value to set the Raster.UndefinedValue property of created rasters to, if the data format itself does not hold this information (as is the case for e.g. GeoTIFF). The undefined value will also be used to fill missing areas when multiple rasters have to be connected into one.
If this property is not specified, and the data format does not define an undefined value, raster cells will be initialized to the highest value for the bit depth of the created raster.
When reading RGB data from a GeoTIFF file, the undefined value (from the file or specified explicitly) will not be set on the raster. Instead an RGBA raster will be returned, where the alpha channel will be set to 0 for all cells where the RGB value matches the undefined value.
Platforms
Windows, Linux, Android