phyloregion (version 1.0.2)

fishnet: Create a fishnet of regular grids

Description

The fishnet function creates a regular grid of locations covering the study area at various grain sizes.

Usage

fishnet(mask, res = 0.5)

Arguments

mask

a polygon shapefile covering the boundary of the survey region.

res

the grain size of the grid cells in decimal degrees (default).

Value

A spatial polygon object of equal area grid cells covering the defined area.

References

Phillips, S.J., Anderson, R.P. & Schapire, R.E. (2006) Maximum entropy modeling of species geographic distributions. Ecological Modelling 190: 231-259.

Examples

# NOT RUN {
library(raster)
file <- system.file("nigeria/nigeria.rds", package="phyloregion")
d <- readRDS(file)
d1 <- fishnet(d, res = 0.75)
# }