There are only two conditions under which REM cannot automatically determine what image to acquire data from:
- Overlapping images: One image overlaps the other, and the geometry for the REM object is within or touching both images.
- Adjacent images: One image is tiled next to another, and the geometry for the REM object is within or touching both images.
AutoCAD Raster Design toolset prompts you to select one or more images to operate on. If you are defining a region object, you can select multiple images and a REM object is created for each image. If you are defining an enhanced bitonal region object or a primitive object, you can select only one image when prompted.