Photogram [ pho · to · gram ]
A Photogram is a photographic image made without a camera by placing objects directly onto the surface of a light-sensitive material such as photographic paperand then exposing it to light.
The usual result is a negative shadow image that shows variations in tone that depends upon the transparency of the objects used. Areas of the paper that have received no light appear white; those exposed for a shorter time or through transparent or semi-transparent objects appear grey,while fully exposed areas are black in the final print.
Hand over map photogram