Table 4 The mapped forest area and estimated forest area (million hectares) comparison between different datasets.

From: GF-1 WFV satellite images based forest cover mapping in China supported by open land use/cover datasets

Products

Mapped area

Estimated area

Δ (s | p) (%)

WorldCover

244.74

238.85 ± 1.18

5.89 | 2.47

Esri Land cover

217.76

246.08 ± 1.37

−28.32 | −11.51

FROM-GLC10

238.07

246.80 ± 1.36

−8.73 | −3.54

CRLC

216.78

242.77 ± 1.30

−25.99 | −10.71

GLC-FCS30

222.16

240.49 ± 1.41

−18.33 | −7.62

GlobeLand30

210.72

255.09 ± 1.60

−44.37 | −17.39

CLCD

244.74

237.24 ± 1.23

−13.8 | −5.82

FCM16

230.63

240.71 ± 1.12

−10.08 | −4.19

  1. s = mapped area - estimate area, p = s/estimated area. s < 0 or p < 0 means that the forest area is underestimated. Mapped forest area is the actual extracted forest area in FCM16. Estimated forest area is the area calculated according to the area estimation formula proposed by Olofsson et al.34.
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