rangeDist_grass: Use GRASS to calcuate distance to range edge

In bossMaps: Convert Binary Species Range Maps into Continuous Surfaces Based on Distance to Range Edge

Description

Calculates distance to range boundary and returns a raster object. Alternatively, one could use raster::distance() but it is very slow with large rasters. This function uses GRASS (and requires grass to be available), but is much faster.

Usage

rangeDist_grass(spdata, domain, domainkm = 1000, mask = T, verbose = T,
  clean = F, gisBase = NULL, file)

Arguments

spdata	list object with range and points
domain	Empty raster extent or path to geotif representing the potential modelling domain with resolution, projection, etc.
domainkm	Distance threshold (in km) from expert range to set species domain.
mask	logical indicating whether to mask the distance to values <= domainkm.
verbose	logical indicating whether to print status messages.
clean	logical indicating whether to delete all temporary GRASS files (the default) or keep them. By default these files are in the current tempdir() and will be deleted when quitting R.
gisBase	Path to GRASS Binaries as required by initGRASS
file	filename for output file exported from GRASS.

bossMaps documentation built on May 2, 2019, 3:57 p.m.