def _set_lim_and_transforms(self):
        """
        This is called once when the plot is created to set up all the
        transforms for the data, text and grids.
        """
        # There are three important coordinate spaces going on here:
        #
        #    1. Data space: The space of the data itself
        #
        #    2. Axes space: The unit rectangle (0, 0) to (1, 1)
        #       covering the entire plot area.
        #
        #    3. Display space: The coordinates of the resulting image,
        #       often in pixels or dpi/inch.

        # This function makes heavy use of the Transform classes in
        # ``lib/matplotlib/transforms.py.`` For more information, see
        # the inline documentation there.

        # The goal of the first two transformations is to get from the
        # data space to axes space.  It is separated into a non-affine
        # and affine part so that the non-affine part does not have to be
        # recomputed when a simple affine change to the figure has been
        # made (such as resizing the window or changing the dpi).

        # 3) This is the transformation from axes space to display
        # space.
        self.transAxes = BboxTransformTo(self.bbox)

        # Now put these 3 transforms together -- from data all the way
        # to display coordinates.  Using the '+' operator, these
        # transforms will be applied "in order".  The transforms are
        # automatically simplified, if possible, by the underlying
        # transformation framework.
        #self.transData = \
        #    self.transProjection + self.transAffine + self.transAxes
        self.transData = self.GingaTransform()
        self.transData.viewer = self.viewer

        # self._xaxis_transform = blended_transform_factory(
        #         self.transData, self.transAxes)
        # self._yaxis_transform = blended_transform_factory(
        #         self.transAxes, self.transData)
        self._xaxis_transform = self.transData
        self._yaxis_transform = self.transData
This is called once when the plot is created to set up all the
        transforms for the data, text and grids.