Javadoc
Returns a finite set of
Geometrys containing all of the direct positions on the
boundary of this
Geometry. These object collections shall have further internal
structure where appropriate. The finite set of
Geometrys returned shall be in the
same coordinate reference system as this
Geometry. If the
Geometry is in a
Complex, then the boundary
Geometrys returned shall be in the
same
Complex. If the
Geometry is not in any
Complex, then the boundary
Geometrys returned may have been constructed in response
to the operation. The elements of a boundary shall be smaller in dimension than the original
element.