Traditional representation of urban path in computer generally based on two methods: one is to build urban form models in computer and then represent the path by virtual reality technology. Another depends on the GIS geographic information system, by marking various kinds of information in a series of plans arranged in time sequence, to reflect the usage of a path. Both methods have their own emphasis, but the realizations of them are not easy. Whether urban planners conceive the pedestrian and traffic lines in the site planning, or city acousticians conceive sound-planning or design the sound-scape of urban path, in fact, what they really need is an immediate reappearing method that can bring them all useful information of the path for previewing and adjusting the path design. The new method uses a pair of square images, from the pedestrian perspective, to represent visual space, and use sound events to represent the evolution of sound spaces in one day. All information have been stored in the database, based on user's setting, the computer can represent the urban path immediately. Furthermore, on the basis of this database, we can develop a variety of intelligent applications, such as to diagnose potential sound clash between two neighboring sound spaces and etc.%传统的城市路径计算机再现技术普遍基于两种方法:一种是先建立城市形态计算机模型,然后通过各种虚拟现实技术实现；一种是在GIS地理信息系统中,在按时间序列排列的一系列场地平面图上标注各种信息来反映路径的使用情况.这两种方法各有偏重,但实现的过程都相当繁琐.不管是城市规划师构思场地规划中各种人行交通流线,还是城市声学家进行项目声音规划或路径声景设计,其实他们最需要的是一种即时再现方法,能够高效、快捷地让他们获取各种城市路径相关信息,来校验和调整路径设计.新方法利用对称出现的方形城市实景图片从行人的视角再现视觉空间,利用声音事件来再现声音空间一天内的演变,所有信息均预存在数据库中,能够根据使用者设定,即时在计算机中再现城市路径的情况.除了高质量再现城市路径,还能在此数据库的基础上开发出各种智能应用,例如能够自动诊断路径两侧相邻声音空间的声音冲突情况等功能.
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