The contemporary world is a space full of messages, and information that is exchanged constantly. All the urban visual effects (whether in open spaces or huge images, or in closed public places), have a special visual expression power that defines how they can be used in the field of environmental graphic design.
Large and tourist cities face many problems. Problems related to tourist may arise in communicating tour guide such as the weakness of the information system in identifying tourist sites, the lack of adequate facilities on sites such as maps, movies and educational boards. In tourist cities, one observes that environmentally graphic elements is not used and have no vitality and designed related to the urban texture. The present study, attempts to design and present a model based on informative environmental graphics to determine the specific route of tourism in order to know the space of urban tourism sites. Considering that the purpose of this research is to use the capabilities and functions of environmental graphics in the historical space of tourist cities and finally to provide a model to determine the routing infographic, so in terms of purpose it is practical - development. When studies done related to the scientific principles of environmental graphic design with aesthetic language as an effective tool in facilitating the routing of tourists and paying attention to special tourist routes, it is also based on descriptive-analytical research method. The environmental graphics at Naghsh-e Jahan Square do not respond to the rapid growth and development of this tourist site. This is because in many cases not only it does not convey information to the audience, but causes confusion and difficulty. Most of the environmental graphic factors in Naghsh Jahan Square are not in their proper place and therefore have lost their features and have only made this space more crowded. Therefore, with the proposed model of this research, domestic and foreign audiences can become more familiar and use the facilities and attractions of tourist sites
