treePlotArea (version 3.1.0)

get_boundary_radius: Get the Boundary Radius for a Given Diameter at Breast Height

Description

The boundary radius is the maximum distance a tree with a given diameter at breast height may be away from the center of the plot to still be part of the sample.

Usage

get_boundary_radius(
  dbh,
  unit = c("mm", "cm", "dm", "m"),
  counting_factor = 4,
  area = 10000,
  is_ti_round = TRUE
)

Value

Minimum diameter at breast height in units.

Arguments

dbh

Diameter at breast height in [millimeter].

unit

The unit for the return value.

counting_factor

The basal area factor used in counting the trees. For tally trees in the German national forest inventory its value is 4 [m^2].

area

The reference surface in [m^2]. Leave alone.

is_ti_round

When checking for the boundary circle of a tree to include the center of the plot: round that circle's radius to the unit (i.e. [cm]) as done by Thuenen Institute?

Details

counting_factor and area really don't have to be square meters as long as they are in the same unit.

Examples

# A diameter at breast height of 50.5 cm
get_boundary_radius(505, unit = "mm")
get_boundary_radius(505, unit = "cm")
get_boundary_radius(505, unit  = "m")
get_boundary_radius(505, unit  = "m", is_ti_round = FALSE)