.. _visualisation:

Visualisation
=============

These scripts produce publication-quality light-cone maps of galaxy redshift
surveys.  No summary statistic is measured; the scripts read FITS catalogues
directly and render each galaxy's position in one of two coordinate systems:

* **Polar wedge** — the classic "pizza slice" view, with comoving distance
  [Mpc] on the radial axis and right ascension on the angular axis.  A thin
  declination strip is selected so that large-scale structure (filaments,
  walls, voids) is clearly visible.

* **3D comoving Cartesian** — each galaxy is placed at its true comoving
  position :math:`(x, y, z_\text{cart})` in Mpc; a companion top-down
  projection is also written.

Both scripts share the same catalogue registry and quality-cut logic:
valid RA ∈ [0°, 360°], DEC ∈ [−90°, +90°], redshift > 0, and
``ZWARNING = 0`` where that column is present.

.. toctree::
   :maxdepth: 1

   wedge_plot
   lightcone_3d