Vegetation structure: using visual estimates

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Reference:

J.D. Armston, R.J. Denham, T.J. Danaher, P.F. Scarth, T.N. Moffiet, Prediction and validation of foliage projective cover from Landsat-5 TM and Landsat-7 ETM+ imagery, Journal of applied remote sensing, 3 (2009) 033540