is.valid: Check or fix polygon or extent validity

In terra: Spatial Data Analysis

Check or fix polygon or extent validity

Description

Check the validity of polygons or attempt to fix it. Or check the validity of a SpatExtent.

Usage

## S4 method for signature 'SpatVector'
is.valid(x, messages=FALSE, as.points=FALSE)

## S4 method for signature 'SpatVector'
makeValid(x)

## S4 method for signature 'SpatExtent'
is.valid(x)

Arguments

x	SpatVector or SpatExtent
messages	logical. If TRUE the error messages are returned
as.points	logical. If TRUE, it is attempted to return locations where polygons are invalid as a SpatVector or points

Value

logical

See Also

topology

Examples

w <- vect("POLYGON ((0 -5, 10 0, 10 -10, 0 -5))")
is.valid(w)

w <- vect("POLYGON ((0 -5, 10 0, 10 -10, 4 -2, 0 -5))")
is.valid(w)
is.valid(w, TRUE)

plot(w)
points(cbind(4.54, -2.72), cex=2, col="red")


e <- ext(0, 1, 0, 1)
is.valid(e)

ee <- ext(0, 0, 0, 0)
is.valid(ee)

terra documentation built on Oct. 14, 2024, 5:07 p.m.