基于地理国情数据的交通优势度空间格局分析

Analysis of spatial pattern of transport dominance based on geographic national condition data

基于江苏省第一次地理国情普查数据,文章以江苏省县级以上城市为评价单元,构建"量""质""势"三方面的城镇交通优势度综合评价模型,通过对交通网络密度、交通设施影响度和区位优势度加权求和得到江苏省县级以上城镇交通优势度,并分析其空间分布状况。研究表明,江苏省县级以上城镇交通优势度具有明显的地域特征,且空间自相关性较强,交通优势度高的区域集中在苏南地区以及长江沿岸的苏中南部地区,主要分布在沿沪宁线和沿江地区;交通优势度低的区域集中在苏北地区的县级城镇,以苏北各市市辖区为中心向四周逐步降低。

Based on the general survey data of geographic national condition of Jiangsu province, this paper constructs a comprehensive evaluation mode of urban transport dominance from three aspects: quantity, quality and potential, and obtains the urban transport dominance of the whole province through weighted summation of transport network density,transport facilities influence and location dominance, and analyzes its spatial distribution. The results show that the urban transport dominance of Jiangsu province has obvious regional characteristics, and the spatial autocorrelation is strong. The areas with high transport dominance are concentrated in the south of Jiangsu province and the central and south of Jiangsu province along the Yangtze River, mainly distributed along the Shanghai-Nanjing Line and along the Yangtze River. The areas with low transport dominance are concentrated in the county-level towns in the northern part of Jiangsu province, with the municipal districts in the northern part of Jiangsu province as the center, gradually decreasing around.