A MultiPolygon
is a
MultiSurface
object composed of
Polygon
elements.
MultiPolygon
Examples
On a region map, a
MultiPolygon
could represent a system of lakes.
MultiPolygon
Assertions
A
MultiPolygon
has no twoPolygon
elements with interiors that intersect.A
MultiPolygon
has no twoPolygon
elements that cross (crossing is also forbidden by the previous assertion), or that touch at an infinite number of points.A
MultiPolygon
may not have cut lines, spikes, or punctures. AMultiPolygon
is a regular, closed point set.A
MultiPolygon
that has more than onePolygon
has an interior that is not connected. The number of connected components of the interior of aMultiPolygon
is equal to the number ofPolygon
values in theMultiPolygon
.
MultiPolygon
Properties
A
MultiPolygon
is a two-dimensional geometry.A
MultiPolygon
boundary is a set of closed curves (LineString
values) corresponding to the boundaries of itsPolygon
elements.Each
Curve
in the boundary of theMultiPolygon
is in the boundary of exactly onePolygon
element.Every
Curve
in the boundary of anPolygon
element is in the boundary of theMultiPolygon
.