Correlation Output Types

Depending on what type of image you are exporting, you can choose from among some of the following correlation output file types:

• Bitonal Images. Use to creates resource files compatible with AutoCAD Raster Design toolset ESP version 7 (or higher).
• Color or Grayscale Images. Use to creates resource files compatible with AutoCAD Raster Design toolset 7.5 (or higher). You can save the correlation data externally, rather than in the drawing, so that you can use the same correlation data in another drawing.
• World File. Use if you need to transfer the image to another program that can use a world file, such as a mapping program. You can use the iworldout command to export a world file without exporting the associated image.
• Resource File. Use to share images with other AutoCAD Raster Design toolset users, or for inserting the image into another drawing. A resource file has a .RES extension. You can create resource files for all image types.
• Image File. Use with file types that can store correlation information within the image file. Image File is also a correlation output type option when you are saving an RLC image.
• GeoTIFF. Use with TIFF files to store correlation information within the image file.

Note: Both Resource files and World files are saved to the path specified in the Raster Design Options dialog box. If no correlation search path is designated, AutoCAD Raster Design toolset uses the folder where the image file is stored. For more information, see Correlation Search Paths.