Study on Urban Spatial Characteristic Based on Historic Map Digital Analysis— —Taking Changsha as an Example

In order to find the characteristic of urban space evolution in historical area of Changsha from 1840 to 1949, this article takes advantage of the platform of digitalized historic maps and carries on quantitative digital simulation analysis for the special evolution process of three typical periods. Based on space syntax theory and methods, this article also makes a comparative analysis on integration. It aims to summarize the evolution process and influencing factors of spatial configuration in historical district of Changsha by using digital analysis on historical maps. According to the research, the evolution of spatial configuration of Changsha is affected by the layout of historical urban areas. Due to the various effects, particularly political instability and economic development, the urban center develops from a single-center pattern (1872) to a double-center pattern (1913), and eventually returns to a single-center pattern (1949).This article will be to the historical map digitization, and use the quantitative analysis of the Depthmap1, to explore the morphological evolution in historical area of Changsha from 1840 to 1949.