polygon: Polygon functions
Description
These functions are called internally and will generally not be
required by the user.
Usage
area.polygon(p)
centroid.polygon(p)
# S3 method for polygon
as.matrix(x, ...)
closed.polygon(p)
in.one.polygon(p, x)
in.polygon(p, x)
num.polygons(p)
sub.polygon(p, i)