Panoramics can be created either by digitally combining a group of images or by removing excess data, generally from the top and bottom of a single image. In this portfolio both techniques were used. Generally, the viewer can determine which by checking the filename. If the pano has a name, it was probably composited. If the filename is alphanumeric, it usually came from a single image. In additon, usually images extracted from a single file will be smaller than than those made by combining a group of files.