Spatial identification and scale effects of floating population agglomerations at the community scale: A case study of Beijing
Received date: 2017-12-12
Request revised date: 2018-03-03
Online published: 2018-06-10
Copyright
Floating population agglomeration is a typical "heterogeneous community" in big cities, with the characteristics of socioeconomic duality and and spatial heterogeneity. How to transform the floating population agglomeration has become the focus issue that influences the new-type urbanization process and the citizenization of rural migrant workers. As the basis and premise of the research on floating population agglomeration, the spatial identification of floating population agglomeration is the primary problem that needs to be solved urgently. Based on the identity of land use and population distribution, this paper uses the floating population agglomeration identification method based on spatial collocation to achieve the spatial identification of floating population agglomerations at the community scale. Then it compares the spatial identification results of the floating population agglomerations at the subdistrict scale and the community scale, identifies the spatial scale effects of floating population agglomerations, analyzes the mechanism of spatial scale effects of floating population agglomerations, and explores the necessity of choosing community scale as the basic unit. The results show that: Firstly, the floating population agglomerations at the community scale based on spatial collocation method are highly accurate, which can effectively identify approximately 90% of the floating population agglomerations in the case area. Secondly, the floating population agglomeration has significant spatial scale effects. The identification method at the larger spatial scale (subdistrict scale) easily leads to excessive or omissive identification of floating population settlement area. Meanwhile, the identification method at the smaller spatial scale (community scale) is better to grasp and reflect the social spatial differentiation. Thirdly, the main reasons of the spatial scale effects of the floating population agglomerations are as follows: the large spatial scale that easily overlooks the social spatial differentiation, the urban and rural binary socio-economic system and the high-speed urbanization process. The findings will provide technical support and methodological reference for the systematic and meticulous research of floating population agglomeration, as well as the scientific basis for the government to make relevant policies on floating population agglomerations.
ZHAO Meifeng , LIU Shenghe , QI Wei . Spatial identification and scale effects of floating population agglomerations at the community scale: A case study of Beijing[J]. GEOGRAPHICAL RESEARCH, 2018 , 37(6) : 1208 -1222 . DOI: 10.11821/dlyj201806011
Fig. 1 The coordinate frame of identifying floating population communities图1 流动人口聚居区的判别坐标系 |
Fig. 2 The process of identifying floating population communities based on space allocation图2 基于空间配置法的流动人口聚居区空间识别技术流程图 |
Fig. 3 The map of the study area图3 研究区域 |
Fig. 4 The spatial distribution of residential land in Beijing图4 北京市居住用地空间分布图 |
Fig. 5 The coordinate frame of identifying floating population community in Beijing图5 北京市分社区流动人口聚居区判别坐标系 |
Fig. 6 The frequency histogram of size (a) and proportion (b) of floating population at the community scale in Beijing图6 北京市分社区流动人口规模和比例频率直方图 |
Fig. 7 The spatial distribution of floating population communities in Beijing图7 北京市分社区流动人口聚居区空间分布图 |
Fig. 8 The spatial cluster type of floating population communities in Beijing图8 北京市分社区流动人口聚居区空间集聚类型图 |
Fig. 9 The frequency histogram of size (a) and proportion (b) of floating population at the subdistrict scale in Beijing图9 北京市分街道流动人口规模和比例频率直方图 |
Fig. 10 The coordinate frame (a) and the spatial distribution (b) of floating population communities at the subdistrict scale in Beijing图10 北京市分街道流动人口聚居区判别坐标系和空间分布图 |
Fig. 11 The scale effects of floating population agglomerations图11 流动人口聚居区的空间尺度效应 |
Tab. 1 Statistics of floating population communites by type in Beijing表1 北京市社区尺度流动人口聚居区分类型统计表 |
| 类型 | 数量 | 流动人口平均规模(人) | 流动人口平均比例(%) |
|---|---|---|---|
| 重合区 | 75 | 17535⬆ | 68.19⬆ |
| 高估识别区 | 83 | 4231⬇ | 78.30⬆ |
| 遗漏识别区 | 45 | 11545⬆ | 60.45⬆ |
注:⬇代表低于社区尺度流动人口聚居区识别阈值;⬆代表高于社区尺度流动人口聚居区识别阈值。 |
The authors have declared that no competing interests exist.
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