In the past years, computer visual simulation is more important in many research domains. Architect and developer can easy estimate architectural design in specialized field with tools of computer-aided design (CAD). But it is not enough for urban planning and design. Because a real urban environment must links to other spatial information. Besides, the urbanization is very fast in Taiwan, mixed-uses is common situation in every city. It is not only 2D problems, also distribute over 3D space. So this research is aimed at discussing how to represent mixed-uses in different city or in different scale to satisfy urban planer or designer that require the information of abundant urban activity.