## CGAL::Polygon_set_2<Kernel,Container,Dcel>

### Definition

The class *Polygon_set_2<Kernel,Container,Dcel>* represents sets of linear polygons with holes.
The first two template parameters (*Kernel* and *Container*)
are used to instantiate the type *CGAL::Polygon_2<Kernel,Container>*.
This type is used to represents the outer boundary of every set member
and the boundaries of all holes of every set member.

The third template parameter *Dcel* should be instantiated with a
model of the concept *GeneralPolygonSetDcel*. It is instantiated
by default with the type *Gps_default_dcel<Traits>*. You can override
this default, with a different Dcel class, typically an extension
of the *Gps_default_dcel* class template. Overriding the default is
necessary only if you intend to obtain the underlying internal arrangement
and process it further.

*#include <CGAL/Polygon_set_2.h>*

### Inherits From

*General_polygon_set_2<Gps_segment_traits_2<Kernel,Container> >*

### See Also

*General_polygon_set_2*

*Gps_segment_traits_2*