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
The boundary of a
Polygon consists of a
LinearRing objects (that is,
LineString objects that are both simple
and closed) that make up its exterior and interior
Polygon has no rings that cross. The
rings in the boundary of a
intersect at a
Point, but only as a
Polygon has no lines, spikes, or
Polygon has an interior that is a
connected point set.
Polygon may have holes. The exterior of
Polygon with holes is not connected.
Each hole defines a connected component of the exterior.
The preceding assertions make a