Mapping urban public spaces based on the Nolli map method

In 1748, Giambattista Nolli published a large map of Rome, which accurately depicted the form and system of public space in the city. This graphic presentation has become a powerful tool for urban space research. However, given the increasingly abundant types of contemporary urban spaces and diverse functions of public buildings, the application of the drawing principle of the Nolli map to contemporary cities remains uncertain. Taking the Laochengnan area in Nanjing as an example, this study investigates the mapping of urban public spaces based on the Nolli map method. On the basis of a field survey, the public and private spaces in the blocks are identified. By comparing the graphic information of the Nolli map and that of the Nolli-type map in terms of public, private, and green spaces, this work also reveals the similarities and differences between traditional and modern urban spaces. Urban spatial mapping methods, including the figure-ground map, street map, and Nolli-type map, are explored and compared using complementary mapping techniques. The practicality and effectiveness of each technique are also discussed. Results show that the Nolli map method is effective in mapping contemporary urban public spaces and provides an effective tool for urban designers and architects to depict and analyze urban public spaces.