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 class 'polygon'
as.matrix(x, ...)
closed.polygon(p)
in.one.polygon(p, x)
in.polygon(p, x)
num.polygons(p)
sub.polygon(p, i)