my $island1 = Geo::Line->filled(...); my $island2 = Geo::Surface->new(...); my $islands = Geo::Surface->new($island1, $island2)
See SYNOPSIS in Geo::Shape
In this context, a "surface" is defined as a set of filled areas with possible enclosures in one projection system. One set of islands can be kept as one surface, or the shapefile data of a country.
See DESCRIPTION in Geo::Shape