get_env_pres: Extract presence data for SDM fitting.

In bmaitner/pbsdm: Small Sample Size Species Distribution Modeling

Extract presence data for SDM fitting.

Description

This function extracts presence data at known presence records.

Usage

get_env_pres(coords, env, env_bg = NULL)

Arguments

coords	Coordinates (long,lat) to extract values for
env	Environmental SpatRaster(s) in any projection
env_bg	Background data produced by get_env_bg, used for re-scaling

Value

A list containing 1) the environmental data at the presence locations (env), and 2) an sf data.frame containing the occurrence records(occurrence_sf).

Examples

 {

# load in sample data

 library(S4DM)
 library(terra)

 # occurrence points
   data("sample_points")
   occurrences <- sample_points

 # environmental data
   env <- rast(system.file('ex/sample_env.tif', package="S4DM"))

 # rescale the environmental data

   env <- scale(env)

env_pres <- get_env_pres(coords = occurrences,
                        env = env)

}

bmaitner/pbsdm documentation built on Feb. 8, 2025, 2:27 p.m.