Internal function

Source: R/alpha.hull.poly.R

Alpha hull process

alpha.hull.poly(
  XY,
  alpha = 1,
  buff = 0.1,
  mode = "spheroid",
  proj_type = "cea"
)

Arguments

XY

data.frame coordinates

alpha

integer if mode planar, in kilometers, if mode spheroid in decimal degrees

buff

numeric

mode

character string either 'spheroid' or 'planar'. By default 'spheroid'

proj_type

crs

Details

The functions ahull_to_SPLDF and alpha.hull.poly were originally posted in the website https://casoilresource.lawr.ucdavis.edu/software/r-advanced-statistical-package/working-spatial-data/converting-alpha-shapes-sp-objects/ in a now broken link. It is also used in functions written by David Bucklin, see https://github.com/dnbucklin/r_movement_homerange