MEASUREMENTS FOR SPATIAL FIELD OF CITIES AT PREFECTURE LEVEL OR ABOVE IN CHINA BASED ON ACCESSIBILITY AND FIELD-STRENGTH MODEL
PAN Jing-hu1, LIU Ying2
1. College of Geographic and Environmental Science, Northwest Normal University, Lanzhou 730070, China;
2. Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
Abstract Spatial filed is an abstract concept to define the potential difference came from the process of the growth pole of regional economy driving the economic development of periphery areas through transport corridors. In this paper, complex components for calculating the urban nodality index are selected, with consideration to the following five specific aspects, i.e., economic development, social progress, science & education, resources & infrastructure and ecological environment conditions. With the application of raster cost weighted distance method,k-order data fields and EADA(Exploratory Spatial Data Analysis),this paper attempts to comprehensively measure the regional accessibility and the spatial field of cities at prefecture level or above in China,and to reveal the spatio-temporal characteristics of macro disparities,the three zones and the economic disparities in the Northern-Southern China from inter-province,inter-city,inter-county. The results indicate that the accessibility condition continues to be improved and the average accessibility is min and 193.43 in 1991 and 2010 respectively,increase by 53.55min. Moreover,spatial filed have been increasing significantly from 1991 to 2010,while the economic disparities are different at different research scales. The distribution pattern of spatial field appears to be single-core form in 1991,while that in 2010 tends to be "multi-polar" network form. The differences between the Southern and Northern China evolves from "South and North are in balance" to "South is stronger than North".. On the basis of measurement and analysis for urban spatial filed,a two-level zoning project of urban economic regions of the whole country is put forward.
2014, Vol. 29 
