P.hv: Hemispherical-Voronoi Gap Fraction

In adam-erickson/gapfraction: Functions for processing airborne LiDAR scans of forests

Hemispherical-Voronoi Gap Fraction

Description

This function implements Erickson's hemispherical-Voronoi gap fraction algorithm with four common lens geometries: equi-distant, equi-angular, stereographic, and orthographic

Usage

P.hv(las = NA, model = "equidist", thresh.val = 1.25,
  thresh.var = "height", reprojection = NA, pol.deg = 5, azi.deg = 45,
  col = "height", plots = TRUE, plots.each = FALSE, plots.save = FALSE)

Arguments

las	Path or name of LAS file. Defaults to NA.
model	Hemispherical lens geometry model to use. Options include equi-distant ("equidist"), equi-angular ("equiangle"), stereographic ("stereo"), and orthographic ("ortho"). Defaults to "equidist".
thresh.val	Specifies the value to use for thresholding. Defaults to 1.25.
thresh.var	Specifies the LiDAR metric to use for thresholding canopy points. Options include height, intensity, nreturn, and class. Defaults to height.
reprojection	Proj4 projection string to use for reprojection. Defaults to NA.
pol.deg	Specifies the polar resolution for the radial plot lines. Defaults to 5.
azi.deg	Specifies the azimuthal resolution for the radial plot lines. Defaults to 45.
col	Specifies the LiDAR metric to use to color points of first plot in display. Options include height, intensity, nreturn, and class. Defaults to height.
plots	Boolean switch for the interactive display of plots. Defaults to FALSE.
plots.each	Boolean switch for displaying individual of plots. Defaults to FALSE.
plots.save	Boolean switch for the saving of plot files to the las.path folder. Defaults to FALSE.

Value

The results of P.hv

Author(s)

Adam Erickson, [e-mail]

References

Forthcoming

Examples

P.hv(las='C:/plot.las', model='equidist', thresh.val=1.25, thresh.var='height', reprojection=NA, pol.deg=5, azi.deg=45, col='height', plots=TRUE, plots.each=FALSE, plots.save=FALSE)

adam-erickson/gapfraction documentation built on May 12, 2024, 6:15 p.m.