A Polygon
is a planar
Surface
representing a multisided geometry.
It is defined by a single exterior boundary and zero or more
interior boundaries, where each interior boundary defines a hole
in the Polygon
.
Polygon
Examples
On a region map, Polygon
objects could
represent forests, districts, and so on.
Polygon
Assertions
The boundary of a Polygon
consists of a
set of LinearRing
objects (that is,
LineString
objects that are both simple
and closed) that make up its exterior and interior
boundaries.
A Polygon
has no rings that cross. The
rings in the boundary of a Polygon
may
intersect at a Point
, but only as a
tangent.
A Polygon
has no lines, spikes, or
punctures.
A Polygon
has an interior that is a
connected point set.
A Polygon
may have holes. The exterior of
a Polygon
with holes is not connected.
Each hole defines a connected component of the exterior.
The preceding assertions make a Polygon
a
simple geometry.
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