def exterior(self):
if self._exterior is None or self._exterior() is None:
g = lgeos.GEOSGetExteriorRing(self._geom)
ring = LinearRing()
ring.__geom__ = g
ring.__p__ = self
ring._owned = True
ring._ndim = self._ndim
self._exterior = weakref.ref(ring)
return self._exterior()
def exterior(self):
if self.is_empty:
return None
elif self._exterior is None or self._exterior() is None:
g = lgeos.GEOSGetExteriorRing(self._geom)
ring = LinearRing(proj=self.proj)
ring._geom = g
ring.__p__ = self
ring._other_owned = True
ring._ndim = self._ndim
self._exterior = weakref.ref(ring)
return self._exterior()
