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. 2020 Mar 18;15(3):e0230013. doi: 10.1371/journal.pone.0230013

Table 2. Regression models and coefficient of determination (R2).

Where B represents the satellite’s spectral bands.

Model Name Models Pearson r R2
B2Lin Ψw = 0.1266–33.1014 (B2) -0.85 0.71
B3Lin Ψw = 0.5308–24.4544 (B3) -0.61 0.33
B4Lin Ψw = 0.4577–24.9085 (B4) -0.84 0.68
B5Lin Ψw = -2.038 + 3.891 (B5) 0.57 0.28
B6Lin Ψw = 1.473–9.955 (B6) -0.56 0.27
NDVILin Ψw = -4.329 + 4.806 (NDVI) 0.91 0.82
NDWILin Ψw = -1.455 + 2.375 (NDWI) 0.74 0.52
B2Quad Ψw = -0.2065–10.9849 (B2) - 267.6433 (B2)2 - 0.71
B3Quad Ψw = -3.135 + 107.559 (B3)– 1096.141 (B3)2 - 0.48
B4Quad Ψw = -0.0988 + 2.5995 (B4)– 193.7306 (B4)2 - 0.69
B5Quad Ψw = -6.825 + 29.639 (B5)– 32.893 (B5)2 - 0.36
B6Quad Ψw = -0.8057 + 12.3297 (B6)– 53.3119 (B6)2 - 0.23
NDVIQuad Ψw = -8.712 + 17.325 (NDVI) –8.739 (NDVI)2 - 0.89
NDWIQuad Ψw = -1.865 + 5.539 (NDWI)– 4.693 (NDWI)2 - 0.52