Historical prescriptiveness: characteristics identification and overall protection of historical cities from the perspective of spatial translation ——take the ancient city of shipu, zhejiang, china as an example

The rapid development of Chinese cities in the past three decades has caused the transformation of the structure of historical urban spaces, resulting in the fragmentation of historical environment and the blurring of historical pattern. This study proposes to use the epistemology of historical prescriptiveness to recognize the characteristics of urban historical environment, so as to effectively protect the city as a whole. Historical prescriptiveness refers to the spatial-temporal correlation effect in the process of urban historical environment change, which makes the current historical elements of the city present as a whole with hierarchy, structure and system.This kind of epistemology is most prominent in ancient maps. The schema-symbol relation can express the paradigm of traditional structure, the schema-symbol choice can express the order of multiple symbols, and the schema-symbol intention can express the meaning of camp city culture. Based on these potential criteria, this study summarizes the logical relations and existing forms of the old and new elements in urban space, and then explores the historical prescriptive content.The specific content of historical prescriptiveness is embodied in the following aspects: the implicit control of the historical pattern in spatial positioning, the transformation and recognition of historical elements in evolutionary comparison, and the inheritance and continuation of urban memory in the extraction of connotations.Taking the ancient city of Shipu in Zhejiang as an example, the study explores the characteristics of the ancient city of Shipu from three aspects: the succession of Haiphong ’s fortification and city-port structure, the alienation of the texture of the ancient towns and streets of Jiangnan, the rejuvenation of the city with the reappearance of culture in eastern Zhejiang. Based on this case, this study proposes a holistic conservation idea of historical city in the modern context of "space and time compression".