| The South Silk Road Economic Belt links up "The Silk Road Economic Belt" and "The Twenty-first Century Maritime Silk Road",and it is an important part of the "The Belt and Road".In different historical periods,it has involved in more than 10 provinces of Western China,7 countries of South Aisa,11 countries of Southeast Asia,and 27 countries or regions in the Middle East and West Asia.This article took a holistic view,using GIS technology and Accessibility Analysis method,combining with the theory of Geo-information Tupu and cartography,and carried out a series of researches that could be divided into four aspects.(1)First,The paper drew a set of maps about the Southern Silk Road Economic,which described its spatio-temporal evolving patterns,based on the theory and thought of Geo-information Tupu,cartography and GIS visualization technology.Finally the results show that in early historical periods,The Southern Silk Road and its major towns distributed along the river valley,and in the late times,till modern age,thay distributed along the transportation networks,such as highway,railway and so on.Moreover,the space scale of The Southern Silk Road has been expanding over time,its space structure has been more complex,and the number of its major towns have been on a rapid growth.(2)Second,this paper described the spatial statistical characteristics of the Southern Silk Road Economic Belt based on GIS spatial statistical analysis method.The results show that there is a positive spatial autocorrelation in the major cities,and the spatial concentration of major towns is consistent with the high-value area of the kernel density of transportation networks and towns,meanwhile,it is also consistent with the location of core area of the Southern Silk Road Economic Belt.(3)Third,this paper calculated the accessibility of traffic network in the Southern Silk Road Economic Belt based on GIS and accessibility analysis method.The results reflect that traffic accessibility is affected by traffic conditions,distance,traffic network density and the distribution of traffic routes.High-value area of Traffic network accessibility is located in the core area of the Southern Silk Road Economic Belt,and the average travel time of the five historical periods(the Primitive society,The pre Qin period,since the Qin and Han Dynasties,since the Tang and Song Dynasties and The new era in China)is respectively 60,20,40,30 and 5 hours.The low-value area of traffic network accessibility is located in the area without traffic network.(4)Fourth,this paper constructed the accessibility model with the data of trade volume,population,total GDP,transportation cost and distance,and then calculated the spatial accessibility between China and other countries or regions that were involved in the Southern Silk Road Economic Belt by GIS technology.The results indicate that the spatial accessibility is proportional to economic aggregate and population scale,and is inversely proportional to distance and traffic restriction.In addition,the high-value area of spatial accessibility is consistent with the core area of the Southern Silk Road Economic Belt.The core area extends 46 countries or regions.They are respectively areas that were contiguous to China,the Western Pacific Region such as the South China Sea,Malacca Strait and Malay coast,the Northern India Ocean Region such as the Bengal Bay,the Southern tip of India Peninsula and India Ocean coast,the Western Asia such as the Persian Gulf and the area along the Griess river,the Northern Africa Area such as Red Sea Strait,Suez canal and the Mediterranean coast,and other regions of the Southern Silk Road Economic Belt. |
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