1 definition by Lamazhaban
Understorey (or understory, underbrush) in forestry and ecology refers to plant life growing beneath the forest canopy without penetrating it to any extent.
However, also because of the presence of low vegetation and understorey, and a possibly reduced point density, compared to open areas, many more classifications as “non-ground point” have to be made by the filter, increasing the uncertainty of the “ground” classification.
by Lamazhaban February 23, 2014