Symetrical difference

Symetrical difference of SpatialPolygons* objects

# S4 method for class 'SpatialPolygons,SpatialPolygons'
symdif(x, y, ...)

Arguments

x

SpatialPolygons* object

y

SpatialPolygons* object

...

Additional SpatialPolygons* object(s)

Value

SpatialPolygons*

See also

erase

Examples

#SpatialPolygons
p <- shapefile(system.file("external/lux.shp", package="raster"))
b <- as(extent(6, 6.4, 49.75, 50), 'SpatialPolygons')
crs(b) <- crs(p)
sd <- symdif(p, b)
plot(sd, col='red')