gMakeValid {rgeos}

R Documentation

Make invalid geometries valid

Description

Function returns a valid geometry, not available before GEOS 3.8.0

Usage

gMakeValid(spgeom, byid=FALSE, id = NULL)

Arguments

spgeom	sp object as defined in package sp
byid	Logical determining if the function should be applied across subgeometries (TRUE) or the entire object (FALSE)
id	Character vector defining id labels for the resulting geometries, if unspecified returned geometries will be labeled based on their parent geometries' labels.

Details

Returns a valid geometry or collection of geometries of different types

Author(s)

Roger Bivand

See Also

SpatialCollections-class

Examples

# Based on test geometries from sf
run <- FALSE
if (version_GEOS0() >= "3.8.0") run <- TRUE
if (run) {
X <- readWKT("POLYGON ((0 0, 0.5 0, 0.5 0.5, 0.5 0, 1 0, 1 1, 0 1, 0 0))")
gIsValid(X)
}
if (run) {
class(X)
}
if (run) {
row.names(X)
}
if (run) {
Y <- gMakeValid(X)
}
if (run) {
gIsValid(Y)
}
if (run) {
class(Y)
}
if (run) {
plot(slot(Y, "polyobj"))
plot(slot(Y, "lineobj"), add=TRUE, col="red")
}
if (run) {
row.names(slot(Y, "polyobj"))
}
if (run) {
row.names(slot(Y, "lineobj"))
}

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