Use terrain and 8 key elements. Use shadows, crown shape, texture. Leaf-off, IR, stereo photos are useful. Phenology may be a key indicator, use multitemporal photos. Cruising Timber Measure tree or stand height.
Measure stand area.
Need relief displacement, scale, parallax. Walk-through stand visit. Monitoring is occurring via transactions and satellite remote sensing. Indexed by section and flight line. Endlap and sidelap specified.