cut_multipoly: Intersect or take complement (?) of polygons

In geo: Draw and Annotate Maps, Especially Charts of the North Atlantic

Description

Intersect or take complement (?) of one or many polygons with a single one.

Usage

cut_multipoly(x, xb, in.or.out = 0)

Arguments

x	Polygon or polygons, seperated with NAs, hence 'multipoly'
xb	Polygon to intersect with/complement from
in.or.out	Whether to take the intersect (0) or complement of x in xb (1). Default 0

Value

List with compents:

x, y	with coordinates of intersection or complement (?)

Note

Check use of in.or.out=1, when there are many polygons in x, how is the complement with xb taken? Needs elaboration. Possibly drop in.or.out from argument list and fix it at 0 in call to findcut.

See Also

Called by geopolygon, calls findcut and prepare.line

geo documentation built on May 29, 2017, 5:36 p.m.