R: Remove holes from polygons

fillHoles {terra} | R Documentation

## 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)

[Package terra version 1.2-10 Index]