An Integrated Field and Hyperspectral Remote Sensing Method for the Estimation of Pigments Content of Stipa Purpurea in Shenzha, Tibet

Table 2

The correlation coefficient of Stipa pigment content and spectral variables.

	Characteristic variables	Chla	Chlb	Chls	Cars
Spectral location variable		−.409	−.407	−.377	−0.007
		−0.016	−0.007	−0.038	−0.157
		−.424	−.398	−.417	0.015
		−.579	−.578	−.556	−0.053
		−.589	−.592	−.571	−0.035
Spectral area variable		−0.414	−.404	−.395	−0.098
		−0.315	−0.322	−0.32	0.038
		0.123	0.124	0.094	−0.09
		−.583	−.584	−.561	−0.06
Vegetation variable	RVI	.707	.728	.694	0.14
	NDVI	.594	.607	.571	0.026
	EVI	.606	.623	.584	0.075
	RDVI	.661	.679	.644	0.09
VI variable	VI1	.597	.627	.609	0.131
	VI2	.569	.594	.578	0.104
	VI3	.626	.630	.585	0.045

Note. and indicate significant levels at 0.05 and 0.01, respectively.