Table 2. The source and unit of used data

Variable Source Unit
Dependence variable Land surface temperature(LST) Landsat image (USGS)
Normalized difference vegetation index(NDVI) Sentinel 2A (European space agency)
Independence variable Environmental characteristic Percentage of building coverage Biotope map %
Percentage of impermeable pavement Biotope map %
Percentage of permeable pavement Biotope map %
Percentage of green space Biotope map %
Percentage of street tree canopy Digitizing %
Socio-economic characteristic Total household number Open data, Seoul city Number
Population number Open data, Seoul city Number
Population density Open data, Seoul city Number/km2
Percentage of individuals aged ≥ 65 years Open data, Seoul city %
Percentage of children ≤ 4 years Open data, Seoul city %
Percentage of living alone aging person Open data, Seoul city %
Household of basic living recipient Percentage of basic living recipient Open data, Seoul city Number %
Percentage of disabled person Open data, Seoul city %