Calculates Basal Area

Calculates Basal Area in square meters.

Usage

silv_tree_basal_area(diameter, units = "cm")

Arguments

diameter

Numeric vector of diameters or diameter classes

units

The units of the diameter (one of mm, cm, dm, or m)

Value

A numeric vector

Details

The function uses the next formula:

\(g = \frac{\pi}{40000} \cdot D^2\)

where g is the basal area in \(m^2\) of one tree, and D is the diameter in cm.

If you want to calculate the basal area for a group of trees (e.g. per hectares), please use silv_stand_basal_area()

See also

silv_stand_basal_area()

Examples

## calculate individual basal area
silv_tree_basal_area(c(23, 11, 43.5, 94))
#> [1] 0.041547563 0.009503318 0.148616967 0.693977817