An image viewer that can decode JPEG and GIF images is needed to display these maps.
Many users can have problems with the larger images.
If you still encounter problems viewing these images, we recommend using an external image viewer instead of the built-in image viewer supplied with your web browser. If you cannot afford a commercial imaging package, we have several shareware suggestions. For Windows, we recommend Lview . For the Macintosh, we recommend GraphicConverter . On UNIX workstations, try xv .