Digital Construction Method And Analytic Application Of Multi-scale Hierarchical Structure In Historic Areas

Historic areas are the material carrier of the historical memory of a town,can truly reflect the traditional features and local characteristics of a region.At present,the discussion on the method of protection and renewal of historic areas in the field of urban design mainly focuses on the following two aspects.On the one hand,the hierarchical and segmented protection mechanism is difficult to fully understand the coherence and correlation between various spatial elements.On the other hand,it is difficult to coordinate the demands of diverse groups such as residents,government and developers,which brings difficulties to the actual operation.Therefore,in the process of protection and renewal of historic areas,designers need an efficient analysis and decision support tool which can integrate the complex spatial morphological information of historic areas and clarify their interrelations,while reflecting the demands of diverse groups of people.The compositional rules of Chinese historic areas can be recognized through the multi-scale hierarchical spatial concepts in the field of typo-morphology.In the previous practice of the protection and renewal of historic areas in China,the small-scale and gradual working method based on micro spatial elements has gradually become an effective means to face the complex problems of historic areas.Both of them confirm from the theoretical and practical levels that the cognition,analysis,protection and renewal of historic areas should start from small-scale spatial elements,properly consider complex information at multi-scale hierarchy and sort out their connections.With the intervention of information technology,the digital-driven analytical method constructs the overall relationship between spatial elements at various scales and levels through the recursion of data information,which provides new method ideas for related research.This paper takes the protection and renewal of Hehuatang historical and cultural block in Nanjing as the main research object,based on Java language programming,explores the digital construction method of the multi-scale hierarchical structure of historic areas,and creates a design decision support tool based on the mathematical model constructed.In the small-scale and gradual working method,this tool assists designers to deal with complex spatial forms and the demands of diverse groups of people,and complete design decisions.This research contents four items.Firstly,the spatial structure of Chinese historical areas is recognized and analyzed based on the scale and hierarchy framework of typo-morphology.Secondly,a mathematical model that can reflect the multi-level spatial element information of historic areas and can perform morphological analysis is constructed through Java language programming,the process of transforming the spatial morphology into a dataset is completed.Thirdly,visual interaction interface is added to the mathematical model,and a design decision support tool that can modify spatial elements and obtain feedback of real-time analysis results at the urban design level is constructed.Finally,this tool is tried by professional designers based on the actual scene of the protection and renewal design of Hehuatang historical and cultural block in Nanjing,the value and scope of application of the tool in practical work are verified,further optimization and improvement directions are obtained.