Grass_Raster_ChangeColortableService - This service allows the user to create or modify the color table for a raster map layer.
Operations:
copyColor - Allows the user to copy the color table from a raster map. predefinedColor - Allows the user to create or modify the color table for a raster map layer using pre-defined color type. userdefinedRules - Allows the user to create or modify the color table for a raster map layer using user-defined color rules file.
