'Returns the EWKT (WKT + SRID) of the Geometry.  Note that Z values
are *not* included in this representation because GEOS does not yet
support serializing them.'

@property
def ewkt(self):

    if self.get_srid():
        return ('SRID=%s;%s' % (self.srid, self.wkt))
    else:
        return self.wkt
