Fig 1.
Population density distribution in various urban areas of Qingdao.
Table 1.
Data sources and characteristics.
Fig 2.
Flowchart of the research.
Table 2.
Comprehensive evaluation index system for suitability of human settlement environment.
Fig 3.
Fitting curve of the correspondence relationship between grid unit area and average relief degree.
Table 3.
Correspondence between grid unit size and average RDLS in the research area.
Fig 4.
The statistical results of the mean change point method.
Fig 5.
Distribution map of RDLS in Qingdao.
Fig 6.
Distribution of NDVI in Qingdao.
Fig 7.
Distribution map of MNDWI in Qingdao.
Fig 8.
Distribution map of THI in Qingdao.
Fig 9.
Distribution map of WEI in Qingdao.
Fig 10.
Distribution map of PM2.5 in Qingdao.
Fig 11.
Distribution map of nighttime light index in Qingdao.
Fig 12.
Distribution map of NDISI in Qingdao.
Fig 13.
Distribution map of TAI in Qingdao.
Fig 14.
Distribution map of RI in Qingdao.
Table 4.
PCA Eigenvalues of suitability evaluation indexes.
Table 5.
Weight of evaluation index for suitability of human settlement environment.
Fig 15.
Distribution map of main built-up areas of Qingdao.
Fig 16.
Comprehensive evaluation results of suitability of human settlement environment in Qingdao.
Fig 17.
Evaluation grade for suitability of human settlement environment in Qingdao.
Table 6.
Proportion of comprehensive evaluation grade of human settlement environment in Qingdao.
Fig 18.
Profiles for quality of human settlement environment in Qingdao.
Fig 19.
The quality of human settlement environment in Qingdao in 2010, 2013, 2016, 2019.
Fig 20.
Hierarchical spatiotemporal change map of suitability of human settlement environment in Qingdao.
Fig 21.
Moran index for quality of human settlement environment in Qingdao.
Fig 22.
Moran scatterplot for quality of human settlement environment in Qingdao.
Fig 23.
LISA cluster map for quality of human settlement environment in Qingdao.
Fig 24.
Distribution map of cold and hot spots of human settlement environment in Qingdao.