Spatial Structure of the Central Soviet Area in Southern Jiangxi in High-Speed Railway Era

As a transport facility can significantly change the regional accessibility,high-speed railway has a key influence on the change of the regional space structure.Taking ArcGIS as a platform,and with the support of socio-economic database and the traffic geographic database,this article measures the regional space structure from three angles which concludes the pattern of each city's average accessibility,the central cities and the division of their hinterlands,as well as space economic network in Southern Jiangxi Central Soviet Area based on the traffic network perspective.The results show that:in high-speed railway era,the accessibility has been significantly improved,and the time-space compression effect is clear in the inner Central Soviet Area.Besides,urban groups which have the best accessibility are gathering along Nanchang-Ji'an-Ganzhou high-speed railway.What's more,the division of central cities' hinterlands based on time-based area displaces that,the hinterland of Ganzhou is the biggest,while the hinterland of Jinggangshan is smallest;at the same time,there exists a little difference in hinterlands' scope of Ji'an,Ruijin,and Nanchang.Therefore,in the Central Soviet Area,its inner network of economic communication forms a multi-central radial pattern while its foreign network of economic relation has an obvious spatial differentiation.