Spatio-temporal evolution analysis of spatial form in Nanfeng based on spatial syntax

Figures & data

Figure 1. Study domain, showing the location of Jiangxi Province in China (top left), the location of Nanfeng County in Jiangxi (top right), and a close-up view of the region of interest (right).

Figure 2. Maps of global integration distribution over time in Nanfeng. (a)end of the Qing Dynasty; (b) 1960; (c) 2004; (d) 2014; (e) 2021. Map lables indicate road names: Jsh: Jianshe Road, Rm: Renmin Road, Xj W: Xujiang West Road, Xj E:Xujiang East Road, Jf: Jiefang Road, Shl: Shengli Road, Chq: Chengqiang Road, Qch: Qincheng Road, Gf: Gaofeng Road, Jt: Jiaotong Road, Zg N: Zigu North Road, Zg: Zigu South Road, Csh: Cangshan Road, Jd: Judu Avenue, Xj: Xinjian Road, Jy S:Juyuan South Road, Jy N:Juyuan North Road, Xf: Xuefu Road, Nx:Nuoxiang Avenue.

Figure 3. Maps of local integration degree distribution over time in Nanfeng. (a) End of the Qing Dynasty, (b) 1960; (c) 2004; (d) 2014; (e) 2021. Map lables indicate road names: Jsh: Jianshe Road, Rm: Renmin Road, Xj W: Xujiang West Road, Xj E:Xujiang East Road, Jf: Jiefang Road, Shl: Shengli Road, Chq: Chengqiang Road, Jt: Jiaotong Road, Jt S:Jiaotong South Road, Zg N: Zigu North Road, Zg S: Zigu South Road, Csh: Cangshan Road, Jd: Judu Avenue, Xj: Xinjian Road, Jy S:Juyuan South Road, Jy N:Juyuan North Road, Xf: Xuefu Road, Nx:Nuoxiang Avenue.

Figure 4. Spatial intelligibility scatterplots of Nanfeng City during: (a) End of the Qing Dynasty; (b) 1960; (c) 2004; (d) 2014; (e) 2021. Trendlines are R² values are given in each subplot.

Figure 5. The comparison of spatial textures of the ancient Nanfeng City and the new Nanfeng City.

Table 1. Analysis of the Evolutionary Laws and Causes of the Urban Form of Nanfeng City.

Urban development period	Evolution characteristics	Causes
Before the Qing Dynasty	The area with a high degree of integration was the center of the ancient city, which developed axially along the “cross” integrated core.	River and terrain factors limit the layout of the ancient city.
The late Qing Dynasty- 1960	The coverage of the integrated core was further expanded, and the integrated core expanded to the northeast.	The demolition of the northern city wall and road construction affected the urban layout.
1960–2004	The integrated core moves northward, and the ancient city expanded along the axis of the new road.	Newly built arterial roads guided the direction of urban development.
2004–2014	The integrated core expanded to the north, and the new city extended to both sides along the main axis of Judu Avenue and Cangshan Road, forming a centrifugal development pattern.	Urban planning and the construction of roads within the city accelerated, allowing the city to expand along the road axis.
2014–2021	The distribution of the integrated core expanded in a grid form.	(1)Traffic development guided the continuous improvement of the new city form. (2）Land resources are tight, meaning the city extended from the center to the periphery.