Rangeland and pasture monitoring: an approach to interpretation of high-resolution imagery focused on observer calibration for repeatability.
Duniway MC, Karl JW, Schrader S, Baquera N, Herrick JE. Rangeland and pasture monitoring: an approach to interpretation of high-resolution imagery focused on observer calibration for repeatability. Environ Monit Assess. 2012 Jun; 184(6):3789-804.