def scale(self):
        """
        What is a representitive number that reflects the magnitude
        of the world holding the paths, for numerical comparisons.

        Returns
        ----------
        scale : float
            Approximate size of the world holding this path
        """
        # use vertices peak-peak rather than exact extents
        scale = float((self.vertices.ptp(axis=0) ** 2).sum() ** .5)
        return scale
What is a representitive number that reflects the magnitude
        of the world holding the paths, for numerical comparisons.

        Returns
        ----------
        scale : float
            Approximate size of the world holding this path