Assign an indexed source value to the destination RasterData at the specified index.
Defines the type of Raster this ReadState will read.
This function is called to initialize the source data in preperation for resampling and assigning into the destination RasterData.
Creates the Tile of the resampled Raster.
Called for cleanup after the ReadState is no longer used.
Overwrite this to translate data from source to destination, for example to tranlsate NoData values.