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case_images: The heat map of population distribution in Chengdu.
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case_images: F2
case_images: The identification and distribution of residential density in Chengdu based on mobile phone data.
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case_images: F3
case_images: 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).
case_images: Street view point distribution in MSA and identification of green view rate.
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case_images: F4
case_images: 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.
case_images: Methodological framework.
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case_images: F5
case_images: The research framework of this paper is shown in Figure 5.