基于空间分析的徐州市居民点分布模式研究

A spatial analysis on patterns of settlements distribution in Xuzhou

居民点空间分布的研究是聚落地理学的主要内容之一,运用空间分析的方法研究居民点的分布能更准确地刻画出其空间分布的本质规律。本文根据2004年TM遥感图像和城市地图得到徐州市城乡居民点空间分布的信息,继而运用样方分析(QA)法、最近邻距离指数(NNI)、K(d)函数、热点探测技术(NNH)研究了徐州市居民点空间分布格局与模式。结果显示:徐州市居民点的空间分布具有明显的空间依赖性,总体上呈现出集聚分布的特点;随着研究尺度的变大,居民点空间分布的集聚性指数也增大;居民点空间分布的热点区域在微观尺度上具有空间随机性、在中观尺度上具有轴带延伸性、宏观尺度上具有面状集中性的特点。

Analysis of spatial distribution characteristics of settlements is an important problem in settlements geography. Using spatial data analysis （SDA） to research on spatial distribution characteristics of settlements can obtain good accuracy. In this paper, the information of Xuzhou settlements distribution is acquired by TM images （2004） and city maps. Then the patterns of settlements distribution in Xuzhou are investigated by quadrat analysis （QA）, nearest neighbor index （NNI）, Ripley＇s K function and hot spots a- nalysis. The following conclusions can be drawn. On the whole, settlements distribution in Xuzhou is spatial dependent and clumped. The degree of settlements agglomeration increases as the investigation scale increasing. The distribution of hot spots of settlements is characterize by spatial random in micro scale, belt structure in medium scale and district structure in macro scale.