Facing the reality of the new computer technologies, we have discussed the role of the computer (and software) in the creative process of the architectural project. This study aims to identify the contribution of these technology resources in the urban design, through comparison between the winning proposal of the competition "Bairro Novo"(São Paulo city - 2004) and Barcelona Plan by Idelfonso Cerdà, 1859. Although these two urban projects, distant in time and space, have conceptual similarities, they differ in their graphical representations. This paper also aims to investigate how these new technologies influenced the creative process of the Bairro Novo urban project.