Land Cover and Forest Type Classification by Values of Vegetation Indices and Forest Structure of Tropical Lowland Forests in Central Vietnam
Table 9
Correlation of vegetation indices with BA and height in ground-truth plots.
BA (m2)
H (m)
NDVI
IPVI
GNDVI
ARVI
EVI
NDI45
RVI
PVI
DVI
TNDVI
BA (m2)
1.00
H (m)
0.73
1.00
NDVI
−0.34
−0.32
1.00
IPVI
−0.34
−0.32
1.00
1.00
GNDVI
−0.08
−0.19
0.69
0.69
1.00
ARVI
−0.02
−0.12
0.81
0.81
0.49
1.00
EVI
−0.66
−0.46
0.60
0.60
0.30
0.19
1.00
NDI45
−0.12
−0.13
0.52
0.52
0.27
0.49
0.13
1.00
RVI
−0.36
−0.30
0.97
0.97
0.63
0.80
0.61
0.54
1.00
PVI
−0.65
−0.43
0.59
0.59
0.29
0.19
0.99
0.14
0.61
1.00
DVI
−0.65
−0.43
0.59
0.59
0.29
0.19
0.99
0.14
0.61
1.00
1.00
TNDVI
−0.63
−0.49
0.73
0.73
0.44
0.32
0.96
0.17
0.71
0.94
0.94
1.00
BA = basal area = ((DBH2·x·π)/4) is the cross-sectional area in m2 of a tree measured at breast height and expressed as per unit of land area. BA in Table 4 is the mean cross-sectional area in ground-truth sample plot; Correlations are significant at .
