The way that cover is estimated on the observation.
closed List of Values:
Value
Description
Sorting
canopy cover
Cover estimated as the percentage of ground covered by a vertical outermost perimeter of the natural spread of foliage of plants. (SRM 1989)
1
foliar cover
Cover estimated as the percentage of ground covered by the vertical portion of plants. Small openings in the canopy and intraspecific overlap are excluded (SRM 1989). Foliar cover is the vertical projection of shoots; i.e., stems and leaves.