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The population analysis unit (PAU) is the basic unit employed in studies of urban populations. The commonly used PAUs are mostly administrative divisions, regular geographic grids. However, these units are different from urban forms, and cannot be used to consider the characteristics of population distributions and flow changes. In this study, we proposed a method for constructing a fine population analysis zone (FPAZ) based on the population aggregation pattern and urban form elements. First, considering the spatial structure of a city and the fine-grained demands of population analysis, the basic analysis unit was divided according to the functional heterogeneity of the population activity region at the micro-scale by combining urban form elements. Next, a population aggregation preference model was established by considering the spatial distribution characteristics of the local aggregation of the urban population flow and long-term stability characteristics depending on the dynamic changes in entrances and exits. Finally, we divided the FPAZ combined with the microstructural elements. Experimental results showed that compared with other types of PAUs, the FPAZ was more consistent with the urban morphology and was an appropriate and general spatial unit for expressing the accurate characteristics of population distributions and changes at the micro-scale.

Construction of a refined population analysis unit based on urban forms and population aggregation patterns