Application of planning evaluation of historical block based on space syntax - - Case study: Third Streets and Two Alleys historical block, Nanning

Abstract

With the current acceleration of urbanization, the evaluation of spatial planning of historical blocks has become an emphasis in urban research. Reasonable spatial interpretation and planning evaluation deserve consideration. This study takes the historical block of the Three Streets and Two Alleys as an example, which is a key development strategy of Nanning city. With GIS spatial analysis method and improved spatial syntax (sDNA model) to construct the syntax model of the core area of the first phase of the third streets and two alleys. Through the analysis of time scale, integration degree, Choice and understandability, the first-phase planning of the block is evaluated on multiple scales. The result shows three conclusions: (1) As an advanced space syntax method (sDNA model) has significant advantages in large-scale in the evaluation of historical blocks. (2) On the whole, the planning evaluation of third streets and two alleys follows the "formal-traffic-function"principle. The integration degree, Choice and understandability have made a certain progress. (3) The correlation between spatial morphology and spatial function is verified by combining commercial data, it shown the space is a part of developing social and economic life. The research argues that, as an advanced special analysis method, sDNA model has a great application prospect.