PMC9485636_01
The heat map of population distribution in Chengdu.
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F2
The identification and distribution of residential density in Chengdu based on mobile phone data.
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F3
Firstly, based on the method of Xiao et al., we used mobile phone signaling data to calculate the number of residential and employment populations in each grid (Figure 3).
Street view point distribution in MSA and identification of green view rate.
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F4
MSA sampling point by calling the interface of Baidu API (Figure 4). Moreover, we calculated the street green view index of MSA by using a semantic image recognition tool.
Methodological framework.
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F5
The research framework of this paper is shown in Figure 5.