buffer_b: Create buffer based on species polygons

In HemingNM/ENMwizard: Advanced Techniques for Ecological Niche Modeling Made Easy

Create buffer based on species polygons

Description

This funcion will create a buffer using species polygons. Buffer width may be manually specified or calculated based on the extent of the SpatialPolygons object (i.e. mean of latitudinal and longitudinal extent). If width is calculated based on the extent of the SpatialPolygons object, it can be adjusted (enlarged or reduced) using 'mult' argument.

Usage

buffer_b(
  occ.polys,
  width = NULL,
  mult = 0.2,
  numCores = 1,
  crs.set = NULL,
  plot = F
)

Arguments

occ.polys	list of SpatialPolygons, usually obj returned from set_calibarea_b()
width	numeric > 0. Unit is meter if x has a longitude/latitude CRS, or mapunits in other cases
mult	How much expand width
numCores	Number of cores to use for parallelization. If set to 1, no paralellization is performed
crs.set	set the coordinate reference system (CRS) of the polygons
plot	logical. Plot results or not?

Value

A named list of SpatialPolygons

See Also

buffer, set_calibarea_b

Examples

## Not run: 
Bvarieg.occ <- read.table(paste(system.file(package="dismo"),
 "/ex/bradypus.csv", sep=""), header=TRUE, sep=",")
colnames(Bvarieg.occ) <- c("SPEC", "LONG", "LAT")
spp.occ.list <- list(Bvarieg = Bvarieg.occ)
occ.polys <- set_calibarea_b(spp.occ.list)
occ.b <- buffer_b(occ.polys, width=150000)

## End(Not run)

HemingNM/ENMwizard documentation built on Jan. 4, 2024, 3:24 p.m.