Analysis of socio-economic spatial structure of urban agglomeration in China based on spatial gradient and clustering

Research background: Previous studies on the economic and social development of urban agglomerations mostly focus a single primacy comparative analysis efficiency evaluation. Spatial structure differentiation is an important feature agglomeration. The lack spatial makes it impossible to determine positioning each city in agglomeration, which affects sustainable devel-opment ability these areas.
 Purpose article: objective article analyze law experience this study explores practice population areas China. For purpose, CPUA its central Zhengzhou was taken as example, gradient example analyzed.
 Methods: Using data 32 cities region, growth pole theory, pole-axis were analyzed with method cluster about radiation index.
 Findings & value added: (1) In process formation CPUA, geo-graphical pattern plays decisive role development. This from developing countries. (2) presents center, gradually radiates metropolitan area, core character demonstration area. (3) gradients Zhengzhou, city, present hierarchy rules characteristics are driven by Beijing-Guangzhou-Railway axis Longhai-Railway axis. (4) still insufficient regional development, shows that accounts for 6% Central Plains Economic Zone 14% GDP, Different countries at different stages have agglomeration models. conclusions China provide new decision-making ideas methods research strategy agglomerations.