Table 3.

Indices used for the CPC mangroves.

Index type	Name Index	Formula	Reference
Specific optical indices for mangroves	Modular Mangrove Recognition Index	$MMRI=\left|MNDWI\right|-\left|NDVI\right|/\left|MNDWI\right|+\left|NDVI\right|$	[50]
	Mangrove Vegetation Index	$MVI=\left|NIR\right|-\left|GREEN\right|/\left|{SWIR}_1\right|-\left|GREEN\right|$	[51]
	Mangrove Index	$MI=\left(NIR-SWIR\right)/\left(NIR*SWIR\right)*10000$	[52]
	Normalized Difference Mangrove Index	$NDMI=\left({SWIR}_2-GREEN\right)/\left({SWIR}_2+GREEN\right)$	[53]
	Combined Mangrove Recognition Index	$CMRI=\left(NDVI-NDWI\right)$	[54]
SAR Index	Radar Forest Degradation Index	$RFDI={\sigma }_{HH}^{°}-{\sigma }_{HV}^{°}/{\sigma }_{HH}^{°}+{\sigma }_{HV}^{°}$	[46]

Where: NIR = near infrared band, RED = red band, SWIR = shortwave infrared band, MIR = middle infrared band.

NDVI = Normalized Difference Vegetation Index, NDWI = Normalized Difference Water Index.

MNDWI = Modified Normalized Difference Water Index, ${\mathrm{\sigma }}_{\text{HH}}^{°}$ , ${\mathrm{\sigma }}_{\text{HV}}^{°}$ = Backscattering of dual polarizations.