应用空间网络方法进行城市化发展分析评估研究——以杭州市为例

Analysis and evaluation of urban development based on spatial network method:a case study of Hangzhou City

城市化是人类社会发展的一个重要过程,应用空间网络的方法进行城市化发展的分析评估研究可以定性、定量地评估城市发展的状况.根据2016年TM遥感影像和城市地图得到杭州市辖区内居民区空间分布的信息,再基于图论的方法建立空间网络,对区域内居民区的空间分布进行了建模分析.通过计算空间网络中边的局部重要性和节点的度中心性2个指标,评估了杭州市城市发展的状况.结果表明:1)空间网络中边的局部重要性指标可以代表某个地区城市化程度的高低,杭州市辖区城市化程度的高低总体上呈现圈层分布,由中心向四周依次降低;2)空间网络节点的度指标反映居民区在该地区的相对重要性及其对周围临近居民区辐射能力的大小,杭州市辖区中居民区分布较集中的区域,其度中心性也较高,彼此之间的联系紧密.

Urbanization was an important process of human social development, which was considered as a continuum from rural to urban settlements. Accordingly, researching on the size , form （ e. g. , compact or spread ） and spatial distribution （ e. g. , dispersed or nucleated ） of different types of settlements was a major issue to better understand urbanization and solve the problems effectively in the process of urbanization. Based on the distribution of settlements in Hangzhou City, it was established the spatial network via graph theory. By analyzing the distribution of settlements area, the weight and degree of edge in the spatial network, the spatial distribution of settlements qualitatively and quantitatively were described, which characterizesd the development of Hangzhou City.