基于苏北地区2007/2008年的SPOT卫星影像,运用空间韵律测度、核密度分布估计、标准差椭圆、最近邻距离指数、空间邻近度等模型,定量分析苏北地区乡村聚落的空间格局特征并探讨聚落的影响因子。结果表明,苏北地区乡村聚落空间分布存在明显的地域分异格局。淮安盐城地区聚落呈现小而集聚型分布,徐州宿迁连云港地区聚落呈现大而稀疏型分布。聚落分布与地貌、水系、交通等因素具有高度相关性。河流泛滥平原聚落分布不规则,山前冲积平原聚落具有较好的连续性,黄土岗地聚落分布破碎化程度较高。盐城、淮安部分地区聚落平均最邻近水系距离较小,有利于农村居民的生产生活。徐州、连云港、宿迁地区聚落平均最邻近道路距离较小,对内对外交通联系便利。最后文章探讨苏北地区乡村聚落的发展及合理布局的措施。
Based on SPOT satellite images of northern Jiangsu area in 2007/2008 year, this paper utilizes spatial metrics, kernel density, standard deviational ellipse, nearest neighbor distance index and spatial proximity to quantitatively analyze the spatial pattern of rural settlements in northern Jiangsu area. Results show some distinct regional variations. Around Hua'an and Yancheng, rural settlements are small in size but high in density. In comparison, around Xuzhou, Suqian and Lianyungang, rural settlements are large in size but low in density. This spatial pattern is highly related to geomorphology, water distribution, and transportation network. Rural settlements in flood plains are usually irregular, while in piedmont alluvial plain area, they show good continuity, and in yellow soil area, they display a high degree of fragmentation. The mean nearest neighbor distance among water networks is small in Yancheng and Huaian, which is conducive for rural residents to work and live. The average distance between settlements and roads is small in Xuzhou, Lianyungang, and Suqian, which indicates favorable transportation condition. Finally, the article discusses the future development of rural settlements and suggests a more reasonable layout in northern Jiangsu area.