This function creates a Voronoi tessellation from a set of spatial points or polygons.
Arguments
- x
A
GVector"points" object.- buffer
Numeric: By default, this function creates a vector that has an extent exactly the same as the input data. However, the apparent extent can be changed by setting this value to a value different from 0. Negative values reduce the size of the extent, and positive extend it. Units are in map units.
See also
terra::voronoi(), sf::st_voronoi(), module v.voronoi in GRASS
Examples
if (grassStarted()) {
# Setup
library(sf)
# Example vectors
madDypsis <- fastData("madDypsis") # points
madCoast4 <- fastData("madCoast4") # polygons
# Convert sf vectors to GVectors
dypsis <- fast(madDypsis)
coast4 <- fast(madCoast4)
ant <- coast4[coast4$NAME_4 == "Antanambe"]
# Delaunay triangulation
dypsisDel <- delaunay(dypsis)
plot(dypsisDel)
plot(dypsis, pch = 1, col = "red", add = TRUE)
# Voronoi tessellation
vor <- voronoi(dypsis)
plot(vor)
plot(dypsis, pch = 1, col = "red", add = TRUE)
# Random Voronoi tessellation
rand <- rvoronoi(coast4, size = 100)
plot(rand)
}