\label{fig:galplane}: Schematic side-view of the tilt of the “True" Galactic Plane with respect to the IAU-defined plane. The drawing is not to scale. The offset of the Sun above the True Galactic Plane, and of the Galactic Center (Sgr A*) below the IAU-defined plane, conspire to tilt the IAU system with respect to the True Plane (in this simplified view) by roughly \(0.13^\circ\), meaning that the red and blue lines shown here cross at a distance roughly 12 kpc from the Sun. Any feature nearer than that to the Sun will appear at negative \(b^{II}\), even if it lies exactly in the Galactic Plane. (Collaborators can edit this figure at https://docs.google.com/drawings/d/1Rqlkxhg0zgDKblkTlxs-fHr-yJBxA1zgeXAVL-J6YIc/edit.)