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| STUDY OF URBAN RANK-SIZE HIERARCHY EVOLUTION IN JIANGSU PROVINCE BASED ON KERNEL DENSITY INTERPRETATION |
| SUN Zai-hong1,2, WANG Ya-hua2, YUAN Yuan2 |
1. School of Geographic and Oceanographic Science, Nanjing University, Nanjing 210093, China;
2. School of Geography Science, Nanjing Normal University, Nanjing 210046, China |
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Abstract Research on urban rank-size hierarchy is supposed to display city distribution in different scales and assemblage levels of urban population. Previous studies have demonstrated that the substance of evolution on urban rank-size hierarchy could be considered as a dynamic procedure, in which city-size keeps expansion and getting together at first place, then transfers to distribution. Following the conclusion of previous results, this research attempts to introduce Kernel analysis, which is a method used more frequently in studies of spatial distribution into urban density calculation. With the method of Kernel analysis on urban density, research expects to display the continuous change trends of city-size distribution pattern more directly and visually, which could provide some new scope for urban rank-size hierarchy research, and come to a conclusion led by some kind of different points. It is concluded that, firstly, Kernel density of urban distribution in western area is much higher than the east part, while southern area is thicker than the north part, which highly keeps in step with the current situation of economic development over the whole province. Secondly, space pattern of urban system turns from core-periphery structure at the initial time of the evolution into pole-axis-cluster structure gradually. Thirdly, further extrude of Nanjing Metropolitan Circle would promote larger scale exploration of giant cyber city with multi-core in Yangtze River Delta, which would play a more significant role in the Yangtze River Delta Area. Finally, in order to promote regional integration development in Jiangsu Province, development modes of urban network with complete functions should be constructed, which sets an even higher demand on urbanization development in Jiangsu Province.
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Received: 20 May 2012
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2012, Vol. 27 
