rgeos (version 0.2-4)

gIsEmpty: Is Geometry Empty?

Description

Tests if the given geometry is empty

Usage

gIsEmpty(spgeom, byid = FALSE)

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)

Value

• Returns TRUE if the given geometry is empty, FALSE otherwise.

See Also

gIsRing gIsSimple gIsValid

Examples

gIsEmpty(readWKT("POINT EMPTY"))
gIsEmpty(readWKT("POINT(1 1)"))
gIsEmpty(readWKT("LINESTRING EMPTY"))
gIsEmpty(readWKT("LINESTRING(0 0,1 1)"))
gIsEmpty(readWKT("POLYGON EMPTY"))
gIsEmpty(readWKT("POLYGON((0 0,1 0,1 1,0 1,0 0))"))