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 two
Polygon
elements with interiors that
intersect.
A MultiPolygon
has no two
Polygon
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. A MultiPolygon
is a
regular, closed point set.
A MultiPolygon
that has more than one
Polygon
has an interior that is not
connected. The number of connected components of the
interior of a MultiPolygon
is equal to
the number of Polygon
values in the
MultiPolygon
.
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 its
Polygon
elements.
Each Curve
in the boundary of the
MultiPolygon
is in the boundary of
exactly one Polygon
element.
Every Curve
in the boundary of an
Polygon
element is in the boundary of the
MultiPolygon
.
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