This means that unless you are printing nothing but the basic colour or tone available on each printer, you are not able to achieve the maximum print resolution of 600dpi. It works out that, in general, somewhere between 200 and 300dpi at the size of the final printed image, is the highest resolution you would want to use on either of the Lab printers. Once scanned, I would have an image that would print at the same size as the original, but at 275dpi. This means that the resolution will vary between machines with different screen sizes. Unlike printing where the physical dimensions of the final output are important, screen based images need to be considered in the context of the equipment they are likely to be used with.
Resolution becomes less important than the actual pixel dimensions of the image.
This image would be no bigger than 400 pixels by 600 pixels. Images can be used to colour or distort the appearance of digitally described spatial and geometric data. For instance, consider a tree. Constructing a tree as a three dimensional object can be achieved coarsely by joining a sphere and a cylinder in a lollipop like arrangement. To increase the credibilty of this construction take an image of a real piece of bark, and wrap it around the cylinder.