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 ofLinearRing
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 aPolygon
may intersect at aPoint
, 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 aPolygon
with holes is not connected. Each hole defines a connected component of the exterior.
The preceding assertions make a Polygon
a
simple geometry.