fill: Remove holes from polygons

In terra: Spatial Data Analysis

Remove holes from polygons

Description

Remove the holes in SpatVector polygons. If inverse=TRUE the holes are returned (as polygons).

Usage

## S4 method for signature 'SpatVector'
fillHoles(x, inverse=FALSE)

Arguments

x	SpatVector
inverse	logical. If TRUE the holes are returned as polygons

Value

SpatVector

Examples

x <- rbind(c(-10,0), c(140,60), c(160,0), c(140,-55))
hole <- rbind(c(80,0), c(105,13), c(120,2), c(105,-13))

z <- rbind(cbind(object=1, part=1, x, hole=0), 
		   cbind(object=1, part=1, hole, hole=1))
colnames(z)[3:4] <- c('x', 'y')
p <- vect(z, "polygons", atts=data.frame(id=1))
p

f <- fillHoles(p)
g <- fillHoles(p, inverse=TRUE)

plot(p, lwd=16, border="gray", col="light yellow")
polys(f, border="blue", lwd=3, density=4, col="orange")
polys(g, col="white", lwd=3)

terra documentation built on Oct. 13, 2023, 5:08 p.m.