  As the number of known Galactic structures mounts thanks to the Gaia Space
Telescope, it is now pertinent to study methods for disentangling structures
occupying the same regions of the Milky Way. Indeed, understanding the precise
form of each individual structure and the interactions between structures may
aid in understanding their origins and chronology. Moreover, accounting for
known structures allows one to probe still finer Galactic structure. In order
to demonstrate, we have developed an odd low-pass filter (OLPF) which removes
smaller, odd-parity structures like the vertical waves, and use the filtered
data to examine the location of the Galaxy's mid-plane. We find that the radial
wave identified by Xu et al. (2015) continues inward to at least the Sun's
location, with an amplitude that decreases towards the inner, denser parts of
the disk, consistent with a simple, qualitative simulation. Additionally, we
employ the OLPF results to determine the solar offset, $z_{\odot}$, with
smaller structures filtered out. We find that $z_{\odot} = 34.2 \pm 0.3$ pc.
