'Return WKT representing a Polygon for this envelope.'

@property
def wkt(self):

    return ('POLYGON((%s    %s,%s    %s,%s    %s,%s    %s,%s    %s))' % (self.min_x, self.min_y, self.min_x, self.max_y, self.max_x, self.max_y, self.max_x, self.min_y, self.min_x, self.min_y))
