Limiting Factors. 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. Field estimations of percent canopy cover may have subjective biases because of the methodology used. Moreover, it may be possible to only estimate upper levels of tree canopy coverage using aerial/satellite imagery because of its inability to offer some of the vertical information capable in LiDAR.
Appears in 3 contracts
Sources: Research Agreement, Research Agreement, Pilot Study Agreement