The intention of this study is to analyze the role of visual communication systems made up of graphic images within the human-space communication framework. The information content of the man-made environment is examined and the effects of graphic images in human-space communication are discussed by illustrated examples. A research is carried on how information is translated into a visual form through examination of steps from conceptualization to juxtaposition of graphic images in space, and how they are perceived a-hd understood. Finally, considerations on how visual communication systems interrelate with the architectural environment to generate messages for identification of particular characteristics of that space.