get_wege: get_wege

In WEGE: A Metric to Rank Locations for Biodiversity Conservation

Description

A function to get the WEGE index value for a provided polygon.

Usage

get_wege(
  target_area,
  input,
  x,
  y,
  species = "binomial",
  category = "category",
  res = 1
)

Arguments

target_area	Either a sp or sf object to which to calculate the WEGE index.
input	Species ranges, either from a shapefile or from a georeferenced species list with a column for species, two columns for coordinates and one for the IUCN category.
x	name of the longitude column.
y	name of the latitude column.
species	name of the species column.
category	name of IUCN the category column. Terminology must be as follows: DD for Data Deficient, LC for Least Concern, NT for Near Threatened, EN, for Endangered, CR for Critically Endangered, EW for Extinct in the wild and EX for Extinct.
res	grid-cell size to use to calculate the range of the species in case a georeferenced species list was provided.

Value

a value corresponding to the WEGE index value of the provided target_area

Examples

library(sp)
library(sf)
library(WEGE)

species <- letters[1:26]
range_list <- list()
for (i in seq_along(species)){
  temp  <-  Polygon(cbind(runif(4,1,50),runif(4,1,50)))
  range_list[[i]] <- Polygons(list(temp), ID = c(species[i]))}
input <- st_as_sf(SpatialPolygons(range_list))
categories <- c('LC','NT','VU','EN','CR')
input$binomial <- species
input$category <- sample(size = nrow(input),x = categories,replace = TRUE)

target_area <- Polygon(cbind(runif(4,1,50),runif(4,1,50)))
target_area <- Polygons(list(target_area), ID = 'Target area')
target_area <- st_as_sf(SpatialPolygons(list(target_area)))
get_wege(target_area,input,species = 'binomial',category = 'category')

WEGE documentation built on July 2, 2020, 2:26 a.m.