引用本文: 闫庆武, 卞正富, 王红. 利用泰森多边形和格网平滑的人口密度空间化研究——以徐州市为例[J]. 武汉大学学报 ( 信息科学版), 2011, 36(8): 987-990.
YAN Qingwu, BIAN Zhengfu, WANG Hong. Census Spatialization Based on Thiessen Polygons and Grids Smoothing:A Case Study in Xuzhou[J]. Geomatics and Information Science of Wuhan University, 2011, 36(8): 987-990.
 Citation: YAN Qingwu, BIAN Zhengfu, WANG Hong. Census Spatialization Based on Thiessen Polygons and Grids Smoothing:A Case Study in Xuzhou[J]. Geomatics and Information Science of Wuhan University, 2011, 36(8): 987-990.

Census Spatialization Based on Thiessen Polygons and Grids Smoothing:A Case Study in Xuzhou

• 摘要: 在运用泰森多边形作边界替代得到徐州市区人口密度的分布图后,采用GCAWI法实现了徐州市区人口数据的空间化,提出了采用大小两种格网错置的平滑方法,并运用此方法得到徐州市2000年和2005年的500 m×500 m的格网人口密度分布图。结果表明:①通过对比两个年份的人口密度分布图可以发现,徐州市区人口密度在2000年~2005年期间具有南移东扩的趋势;②利用大小两种格网错置平滑的方法实现了对人口密度空间化与平滑两个功能,平滑后的结果表明,徐州市区人口密度的空间分布具有块状集聚、轴状延伸的格局,整体来看呈现出“大”字形的态势;③通过与直接运用核函数内插得到的人口密度分布图的对比可以发现,前者对反映人口密度分布的细部差异比较敏感,而后者仅能反映出人口密度空间分布的整体格局。

Abstract: First,the method of Thiessen polygons is employed to research on population density distribution in Xuzhou.Then,census of Xuzhou is spatialized by method of GCAWI.In order to smooth the results,we put forward a method of superimposed grids of different size,and population density distribution based on 500 m grid is drawn.The results show that: ① The population density is towards to move to south and extend to east of Xuzhou between the year of 2000 and 2005;② the method of superimposed grid of different size realizes census spatialization and smoothing;③ By comparising with population density distribution based on Kernel estimation,we can learn that the features in detail of population density distribution are refelected by using the methods of GCAWI and grids smoothing,however,only does integral pattern can be reflected by Kernel estimation.

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