First imaging device collects first image data, whereas second imaging device collects second image data of a storage portion. An image processing module identifies a rim of a container in either the first image data or the second image data. The image processing module preferably overlays an outline of the rim in an image on a display to an operator of a transferring vehicle. The image processing module further identifies the fill level of material in a receiving vehicle container and preferably overlays this information in the image on the display.
