Limiting Factors. Exact, known locations of individual trees. Overlapping of tree crowns [which we found on several occasions, large alder trees with smaller red cedar or ▇▇▇▇▇▇▇ firs growing underneath.] Illumination angles, sensor viewing angles, species, stand density, and image quality can all affect the feasibility of identifying individual tree canopies for both automated and manual methods. Imagery must be of a high enough resolution for individual crowns to be visible. Differing image quality over an area can cause results to vary across a study site.
Appears in 3 contracts
Sources: Research Agreement, Research Agreement, Pilot Study Agreement